The 69th Regiment Armory (also known as the 165th Infantry Armory and the Lexington Avenue Armory) is a historic armory for the U.S. Army National Guard at 68 Lexington Avenue, between East 25th and 26th Streets, in the Rose Hill neighborhood of Manhattan in New York City, United States. Completed in 1906, the armory was designed by the firm of Hunt & Hunt in the Beaux-Arts style. The building is a New York City designated landmark and is listed on the National Register of Historic Places as a National Historic Landmark.
The 69th Regiment Armory was the first armory built in New York City not modeled on a medieval fortress. The building is divided into two parts. The drill shed to the west, in the middle of the block, has a brick facade with limestone trim, as well as a barrel vault. The administration building to the east is three stories high, with a brick-and-limestone facade, a large arch facing Lexington Avenue, and a double-height mansard roof; there are various offices and other rooms inside.