Iowa - Area of significance: Politics/Government
| Adams County Jail |
| Allamakee County Courthouse |
| Allamakee County Court House |
| Alleman, Richard L. and Verda M., Farm Historic District |
| Audobon County Court House |
| Audubon County Courthouse |
| Backbone State Park, Cabin-Bathing Area (Area A) |
| Backbone State Park, Picnicking, Hiking & Camping Area (Area B) |
| Backbone State Park, Richmond Springs (Area C) |
| Bailey, William H. and Alice, House |
| Beeds Lake State Park, Civilian Conservation Corps Area |
| Belknap, Gen. William Worth, House |
| Benton County Courthouse |
| Big Creek Schoolhouse |
| Blackhawk State Park, Black Hawk Preserve (Area B) |
| Blackhawk State Park, Denison Beach Area (Area C) |
| Blackhawk State Park, Wildlife Preserve Area (Area A) |
| Blair House |
| Bremer County Court House |
| Brookhart, Smith Wildman and Jennie (Hearne), House |
| Buchanan County Court House |
| Carey, John T. and Marietta (Greek) House |
| Cass County Court House |
| Catalpa |
| Cedar Falls Post Office |
| Central Fire Station |
| Chaffee-Hunter House |
| Chariton City Hall and Fire Station |
| Chautauqua Pavilion |
| City Market |
| Clark, Alexander, House |
| Clayton County Courthouse |
| Coffin, Lorenzo S., Burial Plot |
| Coralville Union Ecclesiastical Church |
| Council Bluffs Federal Building and Post Office |
| Courthouse Square Historic District |
| Cummins, Albert Baird, House |
| Curtis, Gen. Samuel R., House |
| Dallas County Courthouse |
| Davenport City Hall |
| Davenport Water Co. Pumping Station No. 2 |
| Davis County Courthouse |
| Deering, Nathaniel Cobb and Lucetia Baily, House |
| Des Moines County Court House |
| Des Moines Fire Department Headquarters-Fire Station No. 1 and Shop Building |
| Dodge, Augustus Caesar, House |
| Dolliver Memorial State Park, Entrance Area (Area A) |
| Dolliver Memorial State Park, Picnic, Hiking & Maintenance Area (Area B) |
| Dow House |
| Florence-Council On The Iowa Site |
| Floyd County Court House |
| Former US Post Office Building |
| Foster Park Historic District |
| Garst, Roswell and Elizabeth, Farmstead Historic District |
| Geode State Park, Civilian Conservation Corps Area |
| Gillette, Guy M. and Rose (Freeman), House |
| Grand Mound Town Hall and Waterworks Historic District |
| Gull Point State Park, Area A |
| Gull Point State Park, Area B |
| Hardin County Home Historic District |
| Harlan House Hotel |
| Harlan-Lincoln House |
| Harvat, Emma J., and Mary E. Stach House |
| Hawarden City Hall, Fire Station and Auditorium |
| Henn Mansion |
| Hepburn, Col. William Peters, House |
| Herbert Hoover National Historic Site |
| Heritage Hill Historic District |
| Holdoegel, Perry C. and Mattie Forrest, House |
| Hope Fire Company Engine House |
| Hose Station No. 1 |
| Hose Station No. 6 |
| Humboldt County Court House |
| Ida County Courthouse |
| Iowa Commission for the Blind Building |
| Iowa State Capitol |
| Iron Post |
| Irwin, John N. and Mary L. (Rankin), House |
| Jackson County Courthouse |
| Jackson County Jail |
| Johnson County Courthouse |
| Jones County Court House |
| Jordan House |
| Kirkwood House |
| Knoxville Veterans Administration Hospital Historic District |
| Lacey-Keosauqua State Park, Bathing Area (Area C) |
| Lacey-Keosauqua State Park, Lodge and Picnic Area (Area A) |
| Lacey-Keosauqua State Park, Picnic and Custodial Group (Area B) |
| Lake Ahquabi State Park, Bathhouse Area (Area B) |
| Lake Ahquabi State Park, Picnic Area (Area A) |
| Lake Ahquabi State Park, Refectory Area (Area C) |
| Lake Keomah State Park, Bathhouse-Lodge Area (Area A) |
| Lake Keomah State Park, Erosion Control Area (Area B) |
| LaPorte City Town Hall and Fire Station |
| LeClaire, Antoine, House |
| Lee County Courthouse |
| Lewis, Judge W.H. and Emma, Historic District |
| Lock and Dam No. 11 Historic District |
| Lock and Dam No. 12 Historic District |
| Lock and Dam No. 14 Historic District |
Data from United States Park Service and Wikidata
