Massapequa High School is a public high school located in Massapequa, in Nassau County, on Long Island, in New York, United States.

The Main Campus serves students in grades 10 through 12, while the separate Ames Campus serves 9th grade students.

Massapequa High School opened in its own location on Merrick Road in September 1955.

[2] Massapequa High School underwent an expansion in the northeast corner of the school, with construction of a new wing with eight classrooms completed in September 2007.

The school's football and baseball fields, as well as the track, were redone during the spring and summer of 2017; this resulted in the school's tennis courts being relocated towards the south entrance.