Sunbury Armory is a historic National Guard armory located near Sunbury, in Upper Augusta Township, Northumberland County, Pennsylvania. It was built in 1938, and is a two-story, "I"-plan building consisting of an administration section, stable, and drill hall. It is constructed of concrete block with a brick veneer and executed in the Moderne style.

It was added to the National Register of Historic Places in 1989.

See also

• Milton Armory: also NRHP-listed in Northumberland County
• National Register of Historic Places listings in Northumberland County, Pennsylvania