Peekskill is a city in northwestern Westchester County, New York, United States, 35 miles north of New York City. Established as a village in 1816, it was incorporated as a city in 1940. It lies on a bay along the east side of the Hudson River, across from Jones Point in Rockland County. The population was 25,431 at the 2020 U.S. census, up from 23,583 at the 2010 census. It is the third-largest municipality in northern Westchester County, after Cortlandt and Yorktown.