East Fishkill is a town on the southern border of Dutchess County, New York, United States.

Hudson Valley Research Park is located in the town.

IBM produced microchips at this facility and it also house the advanced, automated processor fabrication facility where IBM's "Cell" processor was co-developed.

Platt Rogers Spencer, the inventor of the leading U.S. business-handwriting style of the 19th Century, was born in the area in 1800.

The southern town line borders Philipstown and Kent, both of which are part of Putnam County.

[7] As of the census of 2000, there were 25,589 people, 8,233 households, and 7,006 families residing in the town.

Of all households 11.9% were made up of individuals, and 3.9% had someone living alone who was 65 years of age or older.