Mount Vernon is a city in Westchester County, New York, United States. It is an inner suburb of New York City, immediately to the north of the borough of the Bronx. Mount Vernon is typically divided into four major sections in four square miles: Downtown, Mount Vernon Heights, North Side, and South Side. Mount Vernon is bordered by the village of Bronxville and city of New Rochelle to the north, by the town of Pelham and village of Pelham Manor to the east, by the Hutchinson River and the Eastchester and Wakefield sections of the Bronx to the south, and by the city of Yonkers and the Bronx River to the west.

Mount Vernon, the eighth-most populous city in the state of New York. Mount Vernon's downtown business district is on the city's south side, which features the City Hall, Mount Vernon's main post office, Mount Vernon Public Library, office buildings, and other municipal establishments.

The Mount Vernon area was first settled in 1664 by families from Connecticut as part of the Town of Eastchester. Mount Vernon became a village in 1853, and a city in 1892. Mount Vernon takes its name from George Washington's Mount Vernon plantation in Virginia, much like neighboring Wakefield (in the Bronx) was named for the Virginia plantation where Washington was born (now part of George Washington Birthplace National Monument).