Scottdale Armory is a historic National Guard armory located at Scottdale, Westmoreland County, Pennsylvania. It was built in 1929, and is a one-story, rectangular brick building executed in the Art Deco style. The administrative area is located on the basement level, with the drill hall on the first floor. A one-story brick annex was added about 1950. It was designed by architect Joseph F. Kuntz. It was added to the National Register of Historic Places in 1991.