Heritage Properties

In accordance with the Ontario Heritage Act, we are required to maintain a register of properties that hold cultural heritage value or interest.

For additional information about heritage property designations, please contact the Clerk’s Department at the Township of South Glengarry.

Heritage Properties Register

Presently, there are 28 Designated Heritage Properties located in the Township of South Glengarry:

Photo	Property Information	Location	Owner Name and Address
	Avondbloem - The MacGillivray House The municipally and provincially designated MacGillivray House, known as "Dalcrombie," was built in the early 1820s by Nor’Wester John McGillivray, a prominent partner in the North West Company and member of the Legislative Council of Upper Canada. Originally a Loyalist homestead, the house evolved over generations, notably through 1905 renovations by McGillivray’s granddaughter, author Carrie Holmes McGillivray. It reflects over two centuries of architectural change and public service by a distinguished Glengarry family.	5227 County Road 27, Williamstown CHARLOTTENBURGH CON 1 SSRR ; PT LOT 13	Tod Davidson & Rebecca Ouimet 5227 County Road 27, Williamstown
	Bethune-Thompson House Built around 1805 as a manse for Reverend John Bethune, the first Presbyterian minister in Upper Canada, the nationally designated house, now recognized with a heritage plaque, later became home to explorer David Thompson. The structure includes parts possibly dating back to the 1780s from Loyalist Peter Ferguson’s original settlement. Thompson, known for his mapping and surveying, lived there with his family while working on important boundary commissions and maintained strong ties to the local community.	19730 John Street, Williamstown CON 1 NRR PT LOTS 49,50 REG ; PLAN 19 PT LOT 1 RP14R2038 ; PARTS 1 TO 4 BETHUNE-THOMSON; HOUSE	Ontario Heritage Foundation 10 Adelaide Street, Toronto
	Bishop's House Property and Cultural Heritage Landscape The municipally and provincially designated Bishop’s House in St. Raphael’s, built in 1808, was the residence of Rev. Alexander Macdonell—the first Roman Catholic Bishop of Upper Canada—and later served as the first Catholic seminary west of Quebec. It played a central role in the early development of the Catholic Church, education, and politics in Upper Canada, evolving into a grand Second Empire-style structure with major expansions in 1924. The site holds deep historical and architectural significance, including its role as a seminary, school, and later a treatment center, with landscaped grounds contributing to its heritage value.	20017 County Road 18, Williamstown CHARLOTTENBURGH CON 7 PT LOT ; 7 RP 14R6020 PARTS 14 AND 15 ; RP 14R6268 PART 1	Glengarry Fencibles Trust 4739 Frog Hollow Road, Green Valley
	Colonel Darby Bergin, 1826-1896 Plaque Bergin, a physician educated at McGill, practiced in Cornwall and aided during major health crises, including typhus and smallpox outbreaks. Elected to Parliament in 1872, he championed public health, rural issues, and labour reforms, influencing future workplace protections. As Canada’s first Surgeon General and a militia leader, he also promoted local industry and infrastructure, earning widespread recognition after his death.	18320 County Road 2, Cornwall CON 1 BF IL S PT LOTS 7,8	Roman Catholic Episcopal Corporation Alexandria 220 Montreal Road, Cornwall
	Farfield Estate The heritage plaque commemorated Fairfield Estate was built in 1865 by John "Cariboo" Cameron, who struck gold in British Columbia’s Cariboo gold fields. The estate was named after his ancestral home and honors his wife Margaret, whose body he famously transported over 8,600 miles for burial in Cornwall after her death in B.C. Cameron later returned west and is buried near Barkerville, British Columbia.	19119 County Road 2, Summerstown CHARLOTTENBURGH CON 1 FT PT ; LOT 14 RP 14R3462 PART 1 RP ; 14R5473 PART 1	2493172 Ontario Inc 3422 Stanley Street, Montreal
	Finlay Grant Farm The Finlay Grant Farm is the municipally designated birthplace of renowned Glengarry author Grace Campbell (1895–1963), whose novels were deeply inspired by her ancestral land and heritage. Settled in the late 18th century by her great-great-grandfather Finlay Grant, the property remained in the family for generations and provided the setting for her first novel, Thorn-Apple Tree. Though the original homestead is gone, the surviving farmhouse where Campbell spent her childhood still stands, preserving a legacy of Scottish Loyalist settlement and literary influence.	18947 County Road 19, Williamstown CON 2 SRR E PT LOT 17	David & Elizabeth Grant 18947 County Road 19, Williamstown
	Finnan McDonald Farm Finnan "the Buffalo" McDonald, a legendary mountain man of the Old West, retired to Williamstown, Glengarry, where he lived with his Pend d’Oreille wife Peggy Ponderay in a home built around 1828 on Gore Road. Though reclusive in retirement, he was known for his extraordinary courage, famously wrestling a wounded buffalo in 1827. The municipally and provincially designated house remains historically significant and stands today as a testament to McDonald’s remarkable legacy.	19408 Gore Road, Summerstown CON 3 FRT PT LOT 8 RP14R3852 ; PART 1	Michel Jalbert 19408 Gore Road, Summerstown
	Fraserfield Built around 1812 by Col. Alexander Fraser, Fraserfield was one of the finest stone country estates of its time, known for its elegant black walnut finishes and symmetrical design. Fraser, a War of 1812 Quartermaster and prominent local leader, served as the first Warden of the Eastern District and represented the region in Upper Canada's Legislative Assembly. Now known as Langview Farms and commemorated with a heritage plaque, the house remains a testament to early 19th-century architecture and Fraser’s legacy.	19163 County Road 17, Williamstown CHARLOTTENBURGH CON 1 NSRR ; PT LOTS 39 AND 40 RP 14R5765 ; PARTS 5 TO 7	Eric & Tamara Lang 19163 County Road 17, Williamstown
	Glengarry Cairn The Glengarry Cairn, a nationally designated site, is Ontario’s largest at 52 feet tall, was built in 1841-42 by the Glengarry militia to honor Sir John Colborne and the military contributions of native peoples and Highlanders. Located on Akwesasne’s northern island, it is likely Canada’s oldest public war memorial, though its construction was controversial due to land expropriation issues with the native community. The cairn originally featured a War of 1812 cannon at its summit and has been repaired several times, with some early recognition of native contributions later omitted.	Cairn Island CON 1 FRT LOTS K & L ; GLENGARRY CARIN NATIONAL ; HISTORIC SITE	Public Works Canada 4900 Yonge Street, 10th Floor, Joseph P. Shepherd Building, North York
	Iona Academy Founded in the early 1800s by Fr. Alexander MacDonell, the heritage plaque commemorated Iona School (later Iona College) was established to train priests for Ontario’s growing Catholic population and played a key role in early Catholic education in Upper Canada. Under the leadership of clergy like Fr. Duncan A. Campbell and the Sisters of Holy Cross, the school expanded to include a girls’ boarding school, a private high school, and eventually a commercial college. By 1965, Iona Academy transitioned into an elementary school and continues today under the Roman Catholic School Board of Eastern Ontario.	20019 King's Road, Williamstown CHARLOTTENBURGH CON 7 PT LOT ; 7 RP 14R202 PT PARTS 1 TO 4 ; RP 14R908 PARTS 4 AND 5 PT; PART 6 RP 14R6020 PARTS 9 11 ; TO 13	Catholic District School Bord of Eastern Ontario 2755 Highway 43, PO Box 2222, Kemptville
	John Curry House The municipally designated John Curry House, built in 1806, is one of the oldest homes in Eastern Ontario and a fine example of Georgian architecture. Constructed with hand-hewn oak, stone fireplaces, and hand-plastered walls, it served as a residence, schoolroom, and post office. Built by the son of United Empire Loyalists, it reflects early Loyalist settlement and craftsmanship in Glengarry.	21831 Concession Road 2, Bainsville CON 2 E PT LOT 9 RP14R474 ; PART 1	Jennifer-Anne Boyer 21831 Concession Road 2, Bainsville
	Lancaster Public Library Built in 1902, the municipally and provincially designated Lancaster Public Library was Glengarry’s first free library, established by John D. Ross with the condition that its rear lot serve as a playground for village children. The two-storey brick building on a high basement reflects early 20th-century civic architecture, featuring arched windows, a symmetrical façade, and a cottage roof with a central dormer. Though later modifications altered its original features, the library remains a lasting part of Lancaster’s historic streetscape.	195 Military Road South, Lancaster PLAN 26 S PT LOT 4	Township of South Glengarry 6 Oak Street, Lancaster
	LeClair House The municipally designated LeClair House in North Lancaster, built in the late 1800s, symbolizes the success of one of Glengarry’s prominent Francophone pioneer families. Featuring Second Empire Revival architecture with a mansard roof and ornate details, it reflects Victorian prosperity and French heritage. The house remains a significant historic and architectural landmark linked to the LeClair family's legacy.	4792 2nd Line Road, North Lancaster LANCASTER CON 6 E PT LOT 24 ; RP 14R6177 PART 1	Carolyn Lovas & Stephen Baker 4792 2nd Line Road, North Lancaster
	Martintown Grist Mill Built in 1846 by Alexander McMartin, the Martintown Grist Mill replaced an earlier milling complex established by his father Malcolm, who had developed the site into a vital hub for sawing timber, grinding grain, and carding wool. For over 50 years, the McMartin family’s mills supported local industry and helped form the village of Martintown along the Raisin River. Today, the restored stone mill, commemorated with a heritage plaque, stands as a cultural landmark, open to the public with exhibits showcasing its historical role in the region’s development.	18544 Dundas Street, Martintown PLAN 20 PT LOT 17	Martintown Mill Preservation Society Corporation 6 Oak Street, Lancaster
	Munro Home The municipally designated Munro Home, owned by a United Empire Loyalist family since 1785, is historically significant for its long family lineage and its Ontario Vernacular architectural style. The house evolved through the 19th century with additions reflecting the growing family and prosperity, including a second storey and rear extension. It remains a strong example of local farming architecture and is currently being restored to preserve its original features.	18269 North Branch Road, Martintown CON 8IL PT LOT 8 BY-LAW ; 32-96 HISTORICAL & ; ARCHITECTURAL HOUSE	Wesley Johnston 7-841 Sydney Street, Unit 102, Cornwall
	Nor-Westers' and Loyalists Museum Housed in the restored 1862 Williamstown Schoolhouse, the municipally and provincially designated Nor’Westers and Loyalist Museum highlights the stories of United Empire Loyalist settlers and local partners of the North West Company. The museum features interactive displays and exhibits on figures like David Thompson and Hugh McGillis, reflecting Glengarry’s role in Canada’s early fur trade and exploration history. It has a second plaque that commemorates the North West Company. It also serves as a community space for events, preserving both architectural and cultural heritage.	19651 John Street, Williamstown PLAN 19 LOTS 19 TO 20	Township of South Glengarry 6 Oak Street, Lancaster
	Premier John Sandfield MacDonald Farm A heritage plaque commemorates the farm in St. Raphael’s where John Sandfield MacDonald was born. He served as Prime Minister of the Province of Canada (1862–64) and became Ontario’s first Premier after Confederation (1867–71). Known for his independent political style, MacDonald played a key role in shaping Ontario’s early government and forming its first coalition with Sir John A. MacDonald.	19963 County Road 18, Williamstown CHARLOTTENBURGH CON 7 PT LOT ; 8 RP 14R5826 PT PARTS 1 TO 4	Dominic Guenette 19963 County Road 18, Williamstown
	Rayside/Dunlop House The municipally designated Rayside Dunlop House, originally the Dunlop general store, served as the first unofficial and then the earliest official post office in the county after 1807. Located in South Lancaster, the property has strong historical ties to the Dunlop and Rayside families, who played key roles in the community’s development. It is designated heritage property due to its importance in the pioneer settlement and local history.	20399 Water Street, South Lancaster PLAN 15 LOTS 1,8	Ronald Rayside 1279 Rue de la Visitation, Montreal
	Royal Canadian Legion 544 The heritage plaque honours Claude J.P. Nunney, who spent much of his childhood in Lancaster Township, was awarded the Distinguished Conduct Medal, Military Medal, and posthumously the Victoria Cross for his bravery during World War I. Born an orphan in England in 1891, he emigrated to Canada and enlisted with the 59th Battalion before serving with the 38th Battalion overseas. Nunney was mortally wounded in 1918, and his medals are now displayed at the Cornwall Armouries.	119 Military Road North, Lancaster PLAN 26 PT BLK D AND RP ; 14R3450 PART 1	Township of South Glengarry 6 Oak Street, Lancaster
	Ruins of Glengarry House The nationally designated ruins of this stone house were once the home of Loyalist John MacDonell, a captain in Butler’s Rangers and the first speaker of Upper Canada’s Legislative Assembly. Born in Scotland, he served in the Royal Highland Regiment before settling in Charlottenburgh Township in 1784 and representing Glengarry from 1792 to 1796. The house was destroyed by fire in 1813.	Highway 2, Cornwall CON 1 FRT PT LOT 26 S/S HWY ; 2	Public Works Canada 4900 Yonge Street, 10th Floor, Joseph P. Shepherd Building, North York
	Sir John Johnson House Sir John Johnson built the Manor House around 1784 on the Raisin River, making it one of Ontario’s oldest homes. Though he never lived there full-time, it became a key gathering spot for Loyalist leaders. The nationally designated house was later owned by notable families, and served as a public library for many years.	19692 William Street, Williamstown CON 1 SRR PT LOTS 48 & 49 ; SURVEY PLAN IRREG	Public Works Canada 4900 Yonge Street, 10th Floor, Joseph P. Shepherd Building, North York
	Sir John Johnson Mills Sir John Johnson, son of Indian Superintendent Sir William Johnson, was a Loyalist leader who settled in Canada during the American Revolution and founded the King’s Royal Regiment of New York. Around 1790, he built a grist and saw mill on the Raisin River in Glengarry County - now heritage plaque commemorated, along with a manor house across the river. Johnson was appointed to the Legislative Council of Lower Canada in 1796, he lived near Montreal until his death in 1830.	19692 William Street, Williamstown CON 1 SRR PT LOTS 48 & 49 ; SURVEY PLAN IRREG	Public Works Canada 4900 Yonge Street, 10th Floor, Joseph P. Shepherd Building, North York
	St. Andrew's United Church and Graveyard In 1829, Martintown’s small wooden church became too small for its congregation, prompting Rev. Archibald Connell to raise funds in Scotland for a larger stone church, later hailed as the finest rural church in Canada. Sadly, Rev. Connell died before its completion, but a memorial tablet was placed in his honor—one of the few items saved when the church was destroyed by fire in 1906. A new church, featuring gothic windows and a graceful spire, was completed in 1910 and still stands today as a municipally designated property.	18540 Kirk Street, Martintown JDG PLAN 107 PT LOT 105	United Church Canada c/o Charlie Kinloch RR2, Martintown
	St. Andrew's United Church and Graveyard The original wooden church built in 1787 served multiple community functions until a second church, built in 1804, collapsed due to poor construction, leading to the building of the current church in 1812. This plaque designated church is admired for its handcrafted woodwork, elegant iron and gold detailing, stained glass, and thoughtfully designed interior. Surrounding it is “God’s Acre,” a well-kept and historically significant cemetery that holds the graves of notable figures like writers Carrie Holmes MacGillivray and Grace Grant Campbell. On the property there are also plaques that commemorate thee MacMillan Emigration of 1802 and Duncan Cameron, former manager of the North West Company	5673 Church Avenue, Williamstown CHARLOTTENBURGH CON 1 N ; RAISIN RIVER PT W 1/2 LOT 50 ; PL 19 PT LOTS 6 AND C N JOHN; ST	St. Andrew's United Church 5673 Church Avenue, Williamstown
	St. Raphael's Ruins In 1786, about 500 Scottish Highlanders, mostly MacDonnells, led by Reverend Alexander MacDonell, emigrated to Canada from the economically depressed Highlands and settled in what is now Glengarry County. Despite initial hardships, they established a thriving community noted for its loyalty and military strength. Father MacDonell founded St. Raphael’s, one of Upper Canada’s earliest Roman Catholic congregations, whose ruins are now a nationally designated and heritage plaque commemorated site. The Ruins also has a heritage plaque commemorating the Glengarry Emigration of 1786	20000 County Road 18, Williamstown CON 7 SE PT LOT 8; CON 7 SW PT LOT 7 SE PT LOT ; 8	Friends of the St. Raphael's Ruins 20000 County Road 18, Williamstown
	Stone Farmhouse William Ross-Peter McCuaig Farmhouse The municipally designated Stone Farmhouse at McCuaig’s Corners, built in 1825 by Alexander Ross, is a prime example of early 19th-century rural vernacular architecture in Eastern Ontario. Constructed of roughly squared fieldstone with Regency-style features like arched stone lintels and a symmetrical five-bay facade, it includes unique elements such as a natural stone-paved basement with an oven. The property changed hands to Peter McCuaig in 1902, who added a frame extension, and later to the Lang family in 1979, with ongoing recommendations to preserve its historic architectural features.	19118 County Road 18, Williamstown CON 1 NSRR PT LOT 38 AND RP ; 14R5756 PART 1	Janet Thompson & Stephen Agnew 19118 County Road 18, Williamstown
	Williamstown Fairgrounds Established in 1812 on land granted by Sir John Johnson, the Williamstown Fair is Canada’s longest continuously running annual fall fair, celebrating Glengarry’s agricultural heritage. Organized by the St. Lawrence Valley Agricultural Society, the fair features traditional and modern exhibits including livestock shows, machinery displays, and home crafts. Over the years, the heritage plaque commemorated fairgrounds have evolved with new facilities, hosting events that foster community spirit and showcase rural life.	19629 John Street, Williamstown CON 1 NRR PT LOTS 48 TO 49 ; PLAN 51 LOTS 1 TO 21 PLAN 51 ; UNOPENED STREETS	St. Lawrence Valley Agricultural Society 19629 John Street, Williamstown
	Workers' Cottage The provincially designated Workers' Cottage, located in historic Williamstown near the Raisin River, was built by Hugh McGillis in the mid-1800s to house workers for his tannery. Originally part of a larger property that included the Sir John Johnson House, it later became a hired man's residence and was passed through several owners before being acquired by the Ontario Heritage Foundation in 1987. The cottage, constructed using a traditional Colombage Bousille method, has been restored and is now used as a rental property, with archaeological digs revealing significant historical artifacts from earlier structures on the site.	19730A County Road 17, Williamstown PLAN 19 PT LOT 1 E/S TANNERY ; RD	Ontario Heritage Foundation 10 Adelaide Street, Toronto

Photo

Property Information

Location

Owner Name and Address

Avondbloem - The MacGillivray House

The municipally and provincially designated MacGillivray House, known as "Dalcrombie," was built in the early 1820s by Nor’Wester John McGillivray, a prominent partner in the North West Company and member of the Legislative Council of Upper Canada. Originally a Loyalist homestead, the house evolved over generations, notably through 1905 renovations by McGillivray’s granddaughter, author Carrie Holmes McGillivray. It reflects over two centuries of architectural change and public service by a distinguished Glengarry family.

5227 County Road 27, Williamstown

CHARLOTTENBURGH CON 1 SSRR ; PT LOT 13

Tod Davidson & Rebecca Ouimet

5227 County Road 27, Williamstown

Bethune-Thompson House

Built around 1805 as a manse for Reverend John Bethune, the first Presbyterian minister in Upper Canada, the nationally designated house, now recognized with a heritage plaque, later became home to explorer David Thompson. The structure includes parts possibly dating back to the 1780s from Loyalist Peter Ferguson’s original settlement. Thompson, known for his mapping and surveying, lived there with his family while working on important boundary commissions and maintained strong ties to the local community.

19730 John Street, Williamstown

CON 1 NRR PT LOTS 49,50 REG ; PLAN 19 PT LOT 1 RP14R2038 ; PARTS 1 TO 4 BETHUNE-THOMSON; HOUSE

Ontario Heritage Foundation

10 Adelaide Street, Toronto

Bishop's House Property and Cultural Heritage Landscape

The municipally and provincially designated Bishop’s House in St. Raphael’s, built in 1808, was the residence of Rev. Alexander Macdonell—the first Roman Catholic Bishop of Upper Canada—and later served as the first Catholic seminary west of Quebec. It played a central role in the early development of the Catholic Church, education, and politics in Upper Canada, evolving into a grand Second Empire-style structure with major expansions in 1924. The site holds deep historical and architectural significance, including its role as a seminary, school, and later a treatment center, with landscaped grounds contributing to its heritage value.

20017 County Road 18, Williamstown

CHARLOTTENBURGH CON 7 PT LOT ; 7 RP 14R6020 PARTS 14 AND 15 ; RP 14R6268 PART 1

Glengarry Fencibles Trust

4739 Frog Hollow Road, Green Valley

Colonel Darby Bergin, 1826-1896 Plaque

Bergin, a physician educated at McGill, practiced in Cornwall and aided during major health crises, including typhus and smallpox outbreaks. Elected to Parliament in 1872, he championed public health, rural issues, and labour reforms, influencing future workplace protections. As Canada’s first Surgeon General and a militia leader, he also promoted local industry and infrastructure, earning widespread recognition after his death.

18320 County Road 2, Cornwall

CON 1 BF IL S PT LOTS 7,8

Roman Catholic Episcopal Corporation Alexandria

220 Montreal Road, Cornwall

Farfield Estate

The heritage plaque commemorated Fairfield Estate was built in 1865 by John "Cariboo" Cameron, who struck gold in British Columbia’s Cariboo gold fields. The estate was named after his ancestral home and honors his wife Margaret, whose body he famously transported over 8,600 miles for burial in Cornwall after her death in B.C. Cameron later returned west and is buried near Barkerville, British Columbia.

19119 County Road 2, Summerstown

CHARLOTTENBURGH CON 1 FT PT ; LOT 14 RP 14R3462 PART 1 RP ; 14R5473 PART 1

2493172 Ontario Inc

3422 Stanley Street, Montreal

Finlay Grant Farm

The Finlay Grant Farm is the municipally designated birthplace of renowned Glengarry author Grace Campbell (1895–1963), whose novels were deeply inspired by her ancestral land and heritage. Settled in the late 18th century by her great-great-grandfather Finlay Grant, the property remained in the family for generations and provided the setting for her first novel, Thorn-Apple Tree. Though the original homestead is gone, the surviving farmhouse where Campbell spent her childhood still stands, preserving a legacy of Scottish Loyalist settlement and literary influence.

18947 County Road 19, Williamstown

CON 2 SRR E PT LOT 17

David & Elizabeth Grant

18947 County Road 19, Williamstown

Finnan McDonald Farm

Finnan "the Buffalo" McDonald, a legendary mountain man of the Old West, retired to Williamstown, Glengarry, where he lived with his Pend d’Oreille wife Peggy Ponderay in a home built around 1828 on Gore Road. Though reclusive in retirement, he was known for his extraordinary courage, famously wrestling a wounded buffalo in 1827. The municipally and provincially designated house remains historically significant and stands today as a testament to McDonald’s remarkable legacy.

19408 Gore Road, Summerstown

CON 3 FRT PT LOT 8 RP14R3852 ; PART 1

Michel Jalbert

19408 Gore Road, Summerstown

Fraserfield

Built around 1812 by Col. Alexander Fraser, Fraserfield was one of the finest stone country estates of its time, known for its elegant black walnut finishes and symmetrical design. Fraser, a War of 1812 Quartermaster and prominent local leader, served as the first Warden of the Eastern District and represented the region in Upper Canada's Legislative Assembly. Now known as Langview Farms and commemorated with a heritage plaque, the house remains a testament to early 19th-century architecture and Fraser’s legacy.

19163 County Road 17, Williamstown

CHARLOTTENBURGH CON 1 NSRR ; PT LOTS 39 AND 40 RP 14R5765 ; PARTS 5 TO 7

Eric & Tamara Lang

19163 County Road 17, Williamstown

Glengarry Cairn

The Glengarry Cairn, a nationally designated site, is Ontario’s largest at 52 feet tall, was built in 1841-42 by the Glengarry militia to honor Sir John Colborne and the military contributions of native peoples and Highlanders. Located on Akwesasne’s northern island, it is likely Canada’s oldest public war memorial, though its construction was controversial due to land expropriation issues with the native community. The cairn originally featured a War of 1812 cannon at its summit and has been repaired several times, with some early recognition of native contributions later omitted.

Cairn Island

CON 1 FRT LOTS K & L ; GLENGARRY CARIN NATIONAL ; HISTORIC SITE

Public Works Canada

4900 Yonge Street, 10th Floor, Joseph P. Shepherd Building, North York

Iona Academy

Founded in the early 1800s by Fr. Alexander MacDonell, the heritage plaque commemorated Iona School (later Iona College) was established to train priests for Ontario’s growing Catholic population and played a key role in early Catholic education in Upper Canada. Under the leadership of clergy like Fr. Duncan A. Campbell and the Sisters of Holy Cross, the school expanded to include a girls’ boarding school, a private high school, and eventually a commercial college. By 1965, Iona Academy transitioned into an elementary school and continues today under the Roman Catholic School Board of Eastern Ontario.

20019 King's Road, Williamstown

CHARLOTTENBURGH CON 7 PT LOT ; 7 RP 14R202 PT PARTS 1 TO 4 ; RP 14R908 PARTS 4 AND 5 PT; PART 6 RP 14R6020 PARTS 9 11 ; TO 13

Catholic District School Bord of Eastern Ontario

2755 Highway 43, PO Box 2222, Kemptville

John Curry House

The municipally designated John Curry House, built in 1806, is one of the oldest homes in Eastern Ontario and a fine example of Georgian architecture. Constructed with hand-hewn oak, stone fireplaces, and hand-plastered walls, it served as a residence, schoolroom, and post office. Built by the son of United Empire Loyalists, it reflects early Loyalist settlement and craftsmanship in Glengarry.

21831 Concession Road 2, Bainsville

CON 2 E PT LOT 9 RP14R474 ; PART 1

Jennifer-Anne Boyer

21831 Concession Road 2, Bainsville

Lancaster Public Library

Built in 1902, the municipally and provincially designated Lancaster Public Library was Glengarry’s first free library, established by John D. Ross with the condition that its rear lot serve as a playground for village children. The two-storey brick building on a high basement reflects early 20th-century civic architecture, featuring arched windows, a symmetrical façade, and a cottage roof with a central dormer. Though later modifications altered its original features, the library remains a lasting part of Lancaster’s historic streetscape.

195 Military Road South, Lancaster

PLAN 26 S PT LOT 4

Township of South Glengarry

6 Oak Street, Lancaster

LeClair House

The municipally designated LeClair House in North Lancaster, built in the late 1800s, symbolizes the success of one of Glengarry’s prominent Francophone pioneer families. Featuring Second Empire Revival architecture with a mansard roof and ornate details, it reflects Victorian prosperity and French heritage. The house remains a significant historic and architectural landmark linked to the LeClair family's legacy.

4792 2nd Line Road, North Lancaster

LANCASTER CON 6 E PT LOT 24 ; RP 14R6177 PART 1

Carolyn Lovas & Stephen Baker

4792 2nd Line Road, North Lancaster

Martintown Grist Mill

Built in 1846 by Alexander McMartin, the Martintown Grist Mill replaced an earlier milling complex established by his father Malcolm, who had developed the site into a vital hub for sawing timber, grinding grain, and carding wool. For over 50 years, the McMartin family’s mills supported local industry and helped form the village of Martintown along the Raisin River. Today, the restored stone mill, commemorated with a heritage plaque, stands as a cultural landmark, open to the public with exhibits showcasing its historical role in the region’s development.

18544 Dundas Street, Martintown

PLAN 20 PT LOT 17

Martintown Mill Preservation Society Corporation

6 Oak Street, Lancaster

Munro Home

The municipally designated Munro Home, owned by a United Empire Loyalist family since 1785, is historically significant for its long family lineage and its Ontario Vernacular architectural style. The house evolved through the 19th century with additions reflecting the growing family and prosperity, including a second storey and rear extension. It remains a strong example of local farming architecture and is currently being restored to preserve its original features.

18269 North Branch Road, Martintown

CON 8IL PT LOT 8 BY-LAW ; 32-96 HISTORICAL & ; ARCHITECTURAL HOUSE

Wesley Johnston

7-841 Sydney Street, Unit 102, Cornwall

Nor-Westers' and Loyalists Museum

Housed in the restored 1862 Williamstown Schoolhouse, the municipally and provincially designated Nor’Westers and Loyalist Museum highlights the stories of United Empire Loyalist settlers and local partners of the North West Company. The museum features interactive displays and exhibits on figures like David Thompson and Hugh McGillis, reflecting Glengarry’s role in Canada’s early fur trade and exploration history. It has a second plaque that commemorates the North West Company. It also serves as a community space for events, preserving both architectural and cultural heritage.

19651 John Street, Williamstown

PLAN 19 LOTS 19 TO 20

Township of South Glengarry

6 Oak Street, Lancaster

Premier John Sandfield MacDonald Farm

A heritage plaque commemorates the farm in St. Raphael’s where John Sandfield MacDonald was born. He served as Prime Minister of the Province of Canada (1862–64) and became Ontario’s first Premier after Confederation (1867–71). Known for his independent political style, MacDonald played a key role in shaping Ontario’s early government and forming its first coalition with Sir John A. MacDonald.

19963 County Road 18, Williamstown

CHARLOTTENBURGH CON 7 PT LOT ; 8 RP 14R5826 PT PARTS 1 TO 4

Dominic Guenette

19963 County Road 18, Williamstown

Rayside/Dunlop House

The municipally designated Rayside Dunlop House, originally the Dunlop general store, served as the first unofficial and then the earliest official post office in the county after 1807. Located in South Lancaster, the property has strong historical ties to the Dunlop and Rayside families, who played key roles in the community’s development. It is designated heritage property due to its importance in the pioneer settlement and local history.

20399 Water Street, South Lancaster

PLAN 15 LOTS 1,8

Ronald Rayside

1279 Rue de la Visitation, Montreal

Royal Canadian Legion 544

The heritage plaque honours Claude J.P. Nunney, who spent much of his childhood in Lancaster Township, was awarded the Distinguished Conduct Medal, Military Medal, and posthumously the Victoria Cross for his bravery during World War I. Born an orphan in England in 1891, he emigrated to Canada and enlisted with the 59th Battalion before serving with the 38th Battalion overseas. Nunney was mortally wounded in 1918, and his medals are now displayed at the Cornwall Armouries.

119 Military Road North, Lancaster

PLAN 26 PT BLK D AND RP ; 14R3450 PART 1

Township of South Glengarry

6 Oak Street, Lancaster

Ruins of Glengarry House

The nationally designated ruins of this stone house were once the home of Loyalist John MacDonell, a captain in Butler’s Rangers and the first speaker of Upper Canada’s Legislative Assembly. Born in Scotland, he served in the Royal Highland Regiment before settling in Charlottenburgh Township in 1784 and representing Glengarry from 1792 to 1796. The house was destroyed by fire in 1813.

Highway 2, Cornwall

CON 1 FRT PT LOT 26 S/S HWY ; 2

Public Works Canada

4900 Yonge Street, 10th Floor, Joseph P. Shepherd Building, North York

Sir John Johnson House

Sir John Johnson built the Manor House around 1784 on the Raisin River, making it one of Ontario’s oldest homes. Though he never lived there full-time, it became a key gathering spot for Loyalist leaders. The nationally designated house was later owned by notable families, and served as a public library for many years.

19692 William Street, Williamstown

CON 1 SRR PT LOTS 48 & 49 ; SURVEY PLAN IRREG

Public Works Canada

4900 Yonge Street, 10th Floor, Joseph P. Shepherd Building, North York

Sir John Johnson Mills

Sir John Johnson, son of Indian Superintendent Sir William Johnson, was a Loyalist leader who settled in Canada during the American Revolution and founded the King’s Royal Regiment of New York. Around 1790, he built a grist and saw mill on the Raisin River in Glengarry County - now heritage plaque commemorated, along with a manor house across the river. Johnson was appointed to the Legislative Council of Lower Canada in 1796, he lived near Montreal until his death in 1830.

19692 William Street, Williamstown

CON 1 SRR PT LOTS 48 & 49 ; SURVEY PLAN IRREG

Public Works Canada

4900 Yonge Street, 10th Floor, Joseph P. Shepherd Building, North York

St. Andrew's United Church and Graveyard

In 1829, Martintown’s small wooden church became too small for its congregation, prompting Rev. Archibald Connell to raise funds in Scotland for a larger stone church, later hailed as the finest rural church in Canada. Sadly, Rev. Connell died before its completion, but a memorial tablet was placed in his honor—one of the few items saved when the church was destroyed by fire in 1906. A new church, featuring gothic windows and a graceful spire, was completed in 1910 and still stands today as a municipally designated property.

18540 Kirk Street, Martintown

JDG PLAN 107 PT LOT 105

United Church Canada c/o Charlie Kinloch

RR2, Martintown

St. Andrew's United Church and Graveyard

The original wooden church built in 1787 served multiple community functions until a second church, built in 1804, collapsed due to poor construction, leading to the building of the current church in 1812. This plaque designated church is admired for its handcrafted woodwork, elegant iron and gold detailing, stained glass, and thoughtfully designed interior. Surrounding it is “God’s Acre,” a well-kept and historically significant cemetery that holds the graves of notable figures like writers Carrie Holmes MacGillivray and Grace Grant Campbell. On the property there are also plaques that commemorate thee MacMillan Emigration of 1802 and Duncan Cameron, former manager of the North West Company

5673 Church Avenue, Williamstown

CHARLOTTENBURGH CON 1 N ; RAISIN RIVER PT W 1/2 LOT 50 ; PL 19 PT LOTS 6 AND C N JOHN; ST

St. Andrew's United Church

5673 Church Avenue, Williamstown

St. Raphael's Ruins

In 1786, about 500 Scottish Highlanders, mostly MacDonnells, led by Reverend Alexander MacDonell, emigrated to Canada from the economically depressed Highlands and settled in what is now Glengarry County. Despite initial hardships, they established a thriving community noted for its loyalty and military strength. Father MacDonell founded St. Raphael’s, one of Upper Canada’s earliest Roman Catholic congregations, whose ruins are now a nationally designated and heritage plaque commemorated site. The Ruins also has a heritage plaque commemorating the Glengarry Emigration of 1786

20000 County Road 18, Williamstown

CON 7 SE PT LOT 8; CON 7 SW PT LOT 7 SE PT LOT ; 8

Friends of the St. Raphael's Ruins

20000 County Road 18, Williamstown

Stone Farmhouse William Ross-Peter McCuaig Farmhouse

The municipally designated Stone Farmhouse at McCuaig’s Corners, built in 1825 by Alexander Ross, is a prime example of early 19th-century rural vernacular architecture in Eastern Ontario. Constructed of roughly squared fieldstone with Regency-style features like arched stone lintels and a symmetrical five-bay facade, it includes unique elements such as a natural stone-paved basement with an oven. The property changed hands to Peter McCuaig in 1902, who added a frame extension, and later to the Lang family in 1979, with ongoing recommendations to preserve its historic architectural features.

19118 County Road 18, Williamstown

CON 1 NSRR PT LOT 38 AND RP ; 14R5756 PART 1

Janet Thompson & Stephen Agnew

19118 County Road 18, Williamstown

Williamstown Fairgrounds

Established in 1812 on land granted by Sir John Johnson, the Williamstown Fair is Canada’s longest continuously running annual fall fair, celebrating Glengarry’s agricultural heritage. Organized by the St. Lawrence Valley Agricultural Society, the fair features traditional and modern exhibits including livestock shows, machinery displays, and home crafts. Over the years, the heritage plaque commemorated fairgrounds have evolved with new facilities, hosting events that foster community spirit and showcase rural life.

19629 John Street, Williamstown

CON 1 NRR PT LOTS 48 TO 49 ; PLAN 51 LOTS 1 TO 21 PLAN 51 ; UNOPENED STREETS

St. Lawrence Valley Agricultural Society

19629 John Street, Williamstown

Workers' Cottage

The provincially designated Workers' Cottage, located in historic Williamstown near the Raisin River, was built by Hugh McGillis in the mid-1800s to house workers for his tannery. Originally part of a larger property that included the Sir John Johnson House, it later became a hired man's residence and was passed through several owners before being acquired by the Ontario Heritage Foundation in 1987. The cottage, constructed using a traditional Colombage Bousille method, has been restored and is now used as a rental property, with archaeological digs revealing significant historical artifacts from earlier structures on the site.

19730A County Road 17, Williamstown

PLAN 19 PT LOT 1 E/S TANNERY ; RD

Ontario Heritage Foundation

10 Adelaide Street, Toronto

Township of South Glengarry
6 Oak Street, PO Box 220
Lancaster ON K0C 1N0
Phone: 613-347-1166
Fax: 613-347-3411