Mount Vernon, located in Westchester County, New York, is the eighth-most populous city in the state. The city is divided into two main sections: Southside Mount Vernon, which is more urban and similar in character to the Bronx to the south, and Northside Mount Vernon, which is more residential. The downtown business district is situated on the Southside, where you’ll find important municipal buildings such as City Hall, the main post office, Mount Vernon Public Library, and several office buildings. This area is a key commercial hub for the city.