Stormont, Dundas and Glengarry are united counties which form a census division of the Canadian province of Ontario. The county seat is Cornwall.

Municipalities

• City of Cornwall
• Township of North Dundas
• Township of North Glengarry
• Township of North Stormont
• Township of South Dundas
• Township of South Glengarry
• Township of South Stormont

See also

• List of Ontario Census Divisions
• The Lost Villages