Iowa - Role: Building
| 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 |
| 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 |
| Campbell Baking Company |
| Cannon, Amaziah and Cornelia (Wait), House |
| Cannon, Wilbur D. and Hattie, House |
| Canton School |
| Carey, John T. and Marietta (Greek) House |
| Carnegie-Ellsworth Public Library |
| Carnegie Library |
| Carnegie Library Building |
| Carnegie-Stout Public Library |
| Carpenter, James Sansom, House |
| Carr, William V., House |
| Carson, Thomas C., House |
| Carstens Farmstead |
| Carter House |
| Case, Hosea S. and Elizabeth, House |
| Case, Larnerd, House |
| Cass County Court House |
| Cassel, Carl and Ulrika Dalander, House |
| Catalpa |
| Cattermole Memorial Library |
| 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 Ice House |
| Cedar Falls Independent Order of Odd Fellows |
| Cedar Falls Post Office |
| 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 Fire Station |
| Central Office Building |
| Central School |
| Central School |
| Chaffee-Hunter House |
| Chamberlain, D.S., Building |
| Chamberlin, Clarence D., House |
| Champlin Memorial Masonic Temple |
| Chapple and Young Block |
| 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 |
| 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 |
| Chicago, Burlington and Quincy Railroad-Creston Station |
| Chicago, Burlington and Quincy Station |
| Chicago, Burlington Northern and Quincy Depot |
| Chicago, Great Western Railroad-Waterloo Freight Depot |
| Chicago, Milwaukee and Pacific Railroad-Albert City Station |
| Chicago, Milwaukee, and St. Paul Railroad-Grafton Station |
| Chicago, Milwaukee, St. Paul and Pacific Freight House |
| Chicago, Milwaukee, St. Paul and Pacific Railroad Company Depot |
| Chicago, Milwaukee & St. Paul Depot-Jefferson |
| Chicago, Milwaukee, St. Paul & Pacific Combination Depot-Hornick |
| Chicago, Milwaukee, St. Paul & Pacific Depot-Delmar |
| Chicago & Northwestern Passenger Depot and Baggage Room-Carroll |
| Chicago, Rock Island and Pacific Passenger Depot-Pella |
| Chicago, Rock Island and Pacific Railroad Passenger Depot |
| Chicago, Rock Island and Pacific Railroad Passenger Station |
| Chicago,Rock Island and Pacific Railroad: Stuart Passenger Station |
| Chicago, Rock Island and Pacific Railroad-Wilton Depot |
| Chicago, Rock Island & Pacific Railroad Depot |
| Chicago, Rock Island & Pacific Railroad Passenger Depot |
| Chickasaw County Courthouse |
| Chickasaw Octagon House |
| Christian Petersen Courtyard Sculptures, and Dairy Industry Building |
| Christiansen, Jens Otto, House |
| Church of St. John the Baptist |
Data from United States Park Service and Wikidata
