Iowa - Significance region: Local
| Budd, Prof, J.L., Sarah M., and Etta Budd, House |
| Buffalo High School |
| Building at 101 North Riverview Street |
| Building at 1119-1121 W. Third Street |
| Building at 126 South Riverview Street |
| Building at 130-132 North Riverview Street |
| Building at 202 W. Third Street |
| Building at 306 South Second Street |
| Building at 813-815 W. Second Street |
| Burdick, Anthony, House |
| Buresh Farm |
| Burkam, Elzy G., House |
| Burlington, Cedar Rapids, and Minnesota Railroad: Walker Station |
| Burlington, Cedar Rapids and Northern Railroad Passenger Station |
| Burlington, Cedar Rapids, and Northern Railroad-Rock Rapids Station, Railroad Track and Bridge |
| Burlington, Cedar Rapids & Northern Freight House |
| Burlington, Cedar Rapids & Northern Passenger Depot-Dows |
| Burlington, Cedar Rapids & Northern Passenger Station-Vinton |
| Burlington Depot |
| Burlington High School |
| Burlington Public Library |
| Burnett-Montgomery House |
| Burns United Methodist Church |
| Burr Oak House/Masters Hotel |
| Burr Oak Savings Bank |
| Busch, Diedrich, House |
| Bush, John D., House |
| Business Part of Olin Historic District |
| Butterworth, Nathaniel, House |
| Byfield, Dr. Albert Henry, House |
| Calder Houses |
| Calhoun County Courthouse |
| Calmar Passenger Depot |
| Calvary Baptist Church/First Baptist Church |
| Cameron, W. S., House |
| Camp Dodge Pool District |
| Cannon, Amaziah and Cornelia (Wait), House |
| Cannon, Wilbur D. and Hattie, House |
| Canton School |
| Carey, John T. and Marietta (Greek) House |
| Carnegie Library |
| Carnegie Library Building |
| Carnegie-Stout Public Library |
| Carpenter, James Sansom, House |
| Carroll City-Mount Olivet Cemetery |
| Carr, William V., House |
| Carson, Thomas C., House |
| Carter House |
| Case, Hosea S. and Elizabeth, House |
| Case, Larnerd, House |
| Castle Terrace Historic District |
| Cathedral Historic District |
| Caulkins, Dr. Martin H., House and Office |
| Cavanaugh-Zetek House |
| Caviness, Carl L., Post 102, American Legion |
| Cavin, Thomas E., House |
| Cawley, James, House |
| C B & Q Passenger Depot |
| Cedar County Sheriff's House and Jail |
| Cedar Falls Downtown Historic District |
| Cedar Falls Ice House |
| Cedar Falls Independent Order of Odd Fellows |
| Cedar Falls Post Office |
| Cedar Rapids 2nd Avenue SE. Automobile Row Historic District |
| Cedar Rapids Central Business District Commercial Historic District |
| Cedar Rapids Central Fire Station |
| Cedar Rapids Milk Condensing Company |
| Cedar Rapids Post Office and Public Building |
| Cedar Rapids Pump Company Factory and Warehouse |
| Cedar Valley Seminary |
| Central City Commercial Historic District |
| Central Fire Station |
| Central Office Building |
| Central Park-North Main Street Historic District |
| Central School |
| Central School |
| Central Vinton Residential Historic District |
| Chaffee-Hunter House |
| Chamberlin, Clarence D., House |
| Champlin Memorial Masonic Temple |
| Chapple and Young Block |
| Chariton Cemetery Historic District |
| Chariton City Hall and Fire Station |
| Chariton Free Public Library |
| Chariton Herald-Patriot Building |
| Chariton Masonic Temple |
| Charles City College Hall |
| Charles City Junior-Senior High School |
| Chase, Charles F. and and Ruth, House |
| Chautauqua Park Historic District |
| Chautauqua Park Historic District |
| Chautauqua Pavilion |
| Cherokee Commercial Historic District |
| Cherokee Public Library |
| Cherry Bank |
| Chevra B'nai Yisroel Synagogue |
| Chicago and North Western Office Building/Passenger Depot-Lake City |
| Chicago and North Western Passenger Depot |
| Chicago, Burlington and Quincy Depot |
| Chicago, Burlington, and Quincy Freight House-Chariton |
Data from United States Park Service and Wikidata
