Alleghany County Courthouse is a historic courthouse building located at Sparta, Alleghany County, North Carolina. It was built in 1933, and is a two-story, H-shaped Classical Revival-style brick building. The front facade features a tetrastyle Tuscan order portico. It was built after "The Big Fire" of 1932 destroyed the courthouse and a block of businesses and homes.
It was listed on the National Register of Historic Places in 1979.