Glens Falls High School, abbreviated GFHS, is a high school serving the Glens Falls City School District and Glens Falls Common School District. It is located at 10 Quade Street near Sherman Avenue in Glens Falls, New York.

Glens Falls is a city in Warren County, New York, United States and is the central city of the Glens Falls Metropolitan Statistical Area. The population was 14,830 at the 2020 census. The name was given by Colonel Johannes Glen, the falls referring to a large waterfall in the Hudson River at the southern end of the city.