Union County Indiana has 5 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Brownsville Covered Bridge, Grove, Dr. John, House and Office, Union County Courthouse.
Some of the country's most noteable architects helped create the Union County places including Henry Mason and G.W. & Son Bunting. Prominent architectural styles found in Union Country are Gothic, Italianate and Romanesque.