Stormont—Dundas—South Glengarry (provincial electoral district)

Stormont—Dundas—South Glengarry is a provincial electoral district in Eastern Ontario, Canada. It was created for the 2007 provincial election. 95.5% came from Stormont—Dundas—Charlottenburgh while 4.5% came from Glengarry—Prescott—Russell.

The riding includes all of the united counties of Stormont, Dundas and Glengarry except for the Township of North Glengarry.