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. As of the 2010 census, Mount Vernon had a population of 67,292.

Mount Vernon, the eighth-most populous city in the state of New York, has two major sections. Southside Mount Vernon is more urban, resembling the Bronx to the south, while Northside Mount Vernon is more residential. Mount Vernon's downtown business district is on the city's Southside, which features the City Hall, Mount Vernon's main post office, Mount Vernon Public Library, office buildings, and other municipal establishments.

In 1894, the voters of Mount Vernon (and nearby Yonkers) voted, along with the voters of Kings County (present day Brooklyn), Queens County, and Richmond County (present day Staten Island), in a referendum on whether or not they wanted to become part of a "Greater New York City". While the results were positive elsewhere, the returns were so negative in Mount Vernon and Yonkers that those two areas were not included in the consolidated city and remained independent.

Unlike neighboring Wakefield (in the Bronx), which was named after the plantation where George Washington was born, Mount Vernon was not named after a site associated with George Washington; the naming of the city of Mount Vernon precedes the eponymous Virginia plantation where Washington spent his final years. Anne Hutchinson founded the Westchester city in the 17th century and named it for its green mount (hence the name, Mount Vernon).

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