Plattekill is a town in Ulster County, New York, United States.

There are five hamlets in the town: Ardonia, Clintondale, Modena, New Hurley, and Plattekill.

The Reformed Dutch Church of New Hurley was built in the 1830s, and listed on the National Register of Historic Places in 1982.

The Shuart-Van Orden Stone House was built in 1740 and listed on the National Register of Historic Places in 1995.

The southern town line is the border of Orange County, dividing Plattekill from Newburgh.