The following Steuben County sites are listed on the National Register of Historic Places:

Collins School, 1877-1943

Combination Shelter, 1936

Fawn River State Fish Hatchery, 1942

Fox Lake, 1928-1950

Free Church, 1876

Cornish Griffin Round Barn, 1915

William L. Lords House, 1848

Enos Michael House, 1850

Pleasant Lake Depot, 1882

Pokagon State Park, 1927, 1934 and 1942

Steuben County Courthouse, 1868

Steuben County Jail, 1877