Ossining (/ˈɒsɪnɪŋ/ OSS-in-ing) is a town located along the Hudson River in Westchester County, New York.

In 1685, Frederick Philipse bought the area which presently constitutes the Town of Ossining from the Sint Sinck, a Munsee-speaking Lenape people.

His Manor extended from Spuyten Duyvil Creek on the border between present-day Manhattan and the Bronx to the Croton River.

The last Lord of the Manor, Frederick Philipse III, was a Loyalist in the American Revolutionary War who fled to England.

In 1901, to prevent confusion of goods made in the village with Sing Sing prison-made items, local officials had the village name changed to Ossining as well.

Of all households 25.5% were made up of individuals, and 9.0% had someone living alone who was 65 years of age or older.

Law enforcement services for the unincorporated section of the town are provided through an inter-municipal agreement with the Village of Ossining Police Department (the town's police department was disbanded in 2011).

The current library collections include 110,000 books, 25,000 non-print items, and 300 newspaper and magazine titles.

The new Ossining Public Library opened in March 2007 and added many new or enhanced services, including over 50 public Internet terminals, a 250-seat theater, an art gallery, and the county's first radio frequency (RFID) circulation system.

[9] Don Draper, the primary protagonist of Mad Men, lives with his family in Ossining.