Harrisburg 19th Street Armory is a historic National Guard armory located at Harrisburg, Dauphin County, Pennsylvania. It was built in 1938, and is a two-story, stucco coated concrete building in the Moderne style. It has a modified "T"-plan, with administrative rooms and garage on the first floor and drill hall above. An "L"-shaped addition dates to 1974.It was added to the National Register of Historic Places in 1991.