The Hoosick Falls Armory is located along Church Street (NY 22) in Hoosick Falls, New York, United States. It is a red brick building with castellated tower dating to the late 19th century. One of many armories in New York designed by state architect Isaac G. Perry, it is one of his earlier armories, more restrained and less imposing than those he built later in his career. It has remained mostly intact since its construction. The military units of the New York National Guard based there, first mustered during the American Civil War, have fought in the 1916 Mexican Border Campaign, in Belgium during World War I, and the Battle of Saipan during World War II. It is closed as a military facility and currently houses the Hoosick Armory Youth Center and Community Coalition, abbreviated as HAYC3