Ardsley High School is a public high school located in Ardsley, New York, in the New York City metropolitan area.

It is a part of the Ardsley Union Free School District.

[4] From the years 1920–1935, the population in Ardsley doubled; therefore an addition was added to the 'old' high school in 1925.

By the second population boom during the post World War II years, the Ardsley School District sought to build a new High School on the former Lewisohn Estate on Washington Hill, which burned to the ground in 1957.

Ardsley competes in Section 1 of the New York State Public High School Athletic Association.