Glengarry County, an area covering 288,688 acres (1,168 km2), is a county in the Canadian province of Ontario, and is historically known for its settlement of Highland Scots due to the Highland Clearances. Glengarry County now consists of the modern-day townships of North Glengarry and South Glengarry and it borders the Saint Lawrence River.Glengarry was founded in 1784 by Scottish loyalists, mainly from Clan MacDonnell, and other Highland Scottish emigrants from Mohawk Valley.