|Location||328 N. Potomac St., Hagerstown, Maryland|
|Area||0.5 acres (0.20 ha)|
|MPS||Maryland National Guard Armories TR|
|NRHP Reference #||85002673|
|Added to NRHP||September 25, 1985|
Hagerstown Armory is a historic armory located at 328 N. Potomac Street in Hagerstown, Washington County, Maryland, United States. It is a two-story Flemish bond brick structure with full basement emulating a Medieval fortification, built in 1926. The front facade features a central block offset by two, three-story towers. Tower tops are characterized by a ring of scalloped stone molding, surmounted by a ring of brick dentils, and topped by two crenelles per side with stone caps. The center section is topped by two crenelles with stone caps with stone tablet bearing the seal of the State of Maryland centered between them.
An article in the July 17, 2009 Hagerstown Herald-Mail announced that the building may soon be sold and transformed into a mental health center. 
- National Park Service (2010-07-09). "National Register Information System". National Register of Historic Places. National Park Service.
- Susanne Moore (July 1985). "National Register of Historic Places Registration: Hagerstown Armory" (PDF). Maryland Historical Trust. Retrieved 2016-01-01.
- Hagerstown Armory, Washington County, including photo from 1991, at Maryland Historical Trust