Blairsville Armory is a historic National Guard armory located at Blairsville, Indiana County, Pennsylvania. It was designed by Pittsburgh architects W.G. Wilkins & Co. It was built in 1909, and is a T-shaped, two-story, three-bay-wide and nine-bay-deep, castle-like building in the Romanesque Revival style. The front section is the flat-roofed administration building, with a gable roofed drill hall behind. It front facade features a central arched entrance with a five-sided, two-story bay window on the right side.

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