Iowa - Constructed - 1910–1919
| Alden Public Library |
| Backbone State Park Historic District |
| Beaver Creek Bridge |
| Beaver Creek Bridge |
| Big 4 Fair Art Hall |
| Big Creek Bridge 2 |
| Black Hawk County Soldiers Memorial Hall |
| Boehmler, H. E., House |
| Boone River Bridge |
| Brown Apartments |
| Bryn Mawr Apartments |
| Building at 202 W. Third Street |
| Byfield, Dr. Albert Henry, House |
| Calhoun County Courthouse |
| C B & Q Passenger Depot |
| Cedar Rapids Central Fire Station |
| Chase, Charles F. and and Ruth, House |
| Clarke, James F., House |
| Clemens Automobile Company Building |
| Colonials Club House |
| Conover, Thomas J., House |
| Crozier, J.T. and Mollie, House |
| Damour, William and Sue, House |
| Des Moines River Bridge |
| Dillon Memorial |
| Ebeling, Arthur, House |
| First Church of Christ, Scientist |
| Garretson Outlet Bridge |
| Grant Vocational High School |
| Hamburg Public Library |
| Hawarden City Hall, Fire Station and Auditorium |
| Herman, John H., House |
| Herring Motor Car Company Building |
| Hippee Building |
| Holdoegel, Perry C. and Mattie Forrest, House |
| Holy Ghost Catholic Historic District |
| Hotel Burlington |
| Hotel Iowa |
| Hotel Ottumwa |
| Hurst, A. A., House |
| Keokuk Young Women's Christian Association Building |
| La Porte City Station |
| Leet, William A., and Frederick Hassler Farmstead District |
| Lincoln Hotel |
| Lincoln Statue |
| Lu Verne City Jail |
| Maine, The |
| Masonic Temple |
| Mederville Bridge |
| Minburn Railroad Depot |
| Municipal Building |
| Neessen, Chris, House |
| New Lawn, The |
| Oskaloosa Monthly Meeting of Friends Parsonage |
| Perkins, George and Lola, House |
| Ricker, B. J., House |
| Sacred Heart School |
| Saints Peter and Paul Catholic Church |
| Sanford, Arthur and Stella, House |
| Shellito, Dr. Judd C. and Margaret S. Clarke, House |
| Shellsburg Bridge |
| Shores-Mueller Company |
| Smouse, Winfield, House |
| Spotts Round Barn |
| Squaw Creek Bridge 2 |
| Stokes, Dr. Ella, House |
| St. Patrick Church |
| Summit Apartment Building |
| Tate Arms |
| Union Cemetery Gardener's Cottage |
| Van Allen Store |
| Villisca National Guard Armory |
| Waterloo Ridge Menigheds Kirke og Kirkegard Historic District |
| WCF & N Center Point Depot and Substation |
| Woodbury County Courthouse |
| Woodlawn Cemetery Gates and Shelter |
Data from United States Park Service and Wikidata
