mount vernon ny is in what county
Mount Vernon, NY. Mount Vernon is located in southeast New York. Mount Vernon is part of Westchester County. Mount Vernon has 4.39 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total Mount Vernon population is 67,962, which has shrunk 0.61% since 2000.
Weather | Natural Extremes | Air Quality | Environmental Watch | Zip Codes | Government. Mount Vernon is located in southeast New York. Mount Vernon is part of Westchester County. Mount Vernon has 4.39 square miles of land area and 0.02 square miles of water area.