Mount Vernon is a city in, and the county seat of, Montgomery County, Georgia, United States. The population was 1,900 at the 2020 census, down from 2,451 in 2010. It is home to Brewton–Parker College.

Montgomery County is a county located in the central portion of the U.S. state of Georgia. As of the 2020 census, the population was 8,610. The county seat is Mount Vernon. Montgomery County is part of the Vidalia, GA micropolitan statistical area.