Memphrémagog (French pronunciation: [mɛmfʁemaɡɔɡ]) is a regional county municipality in the Estrie region of Quebec, Canada.

After the signing of the Treaty of Paris on September 3, 1783, the American Revolutionary War ended.

The border of Lower Canada was then defined at approximately 45 degrees north latitude.

[4][5] The territory immediately adjacent to it became part of Quebec in 1848.

Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border:[10]