The Logan County Courthouse is a historic Second Empire building located on the southeastern corner of Main Street and Columbus Avenue in downtown Bellefontaine, Ohio, United States. Built in 1870 at a cost of $105,398.08, the courthouse was constructed primarily of locally mined sandstone, and it is covered with a mansard roof. The courthouse is adjacent to Court Avenue, the first concrete street in the United States.On June 4, 1973, it was added to the National Register of Historic Places.
