Wappinger is a town in Dutchess County, New York, United States. The town is located in the Hudson River Valley region, on the eastern bank of the Hudson River. The population was 28,216 at the 2020 census. The name is derived from the Wappinger Native Americans who inhabited the area. Wappinger comprises three-fourths of the incorporated village of Wappingers Falls, several unincorporated hamlets such as Chelsea, Diddell, Hughsonville, Middlebush, Myers Corners, New Hackensack, and Swartwoutville, and a number of neighborhoods.

Dutchess County is a county in the U.S. state of New York. As of the 2020 census, the population was 295,911. The county seat is the city of Poughkeepsie. The county was created in 1683, one of New York's first twelve counties, and later organized in 1713. The county is part of the Hudson Valley region of the state.