Iowa - Role: District
| Edmundson Park Historic District |
| Effigy Mounds National Monument |
| Eldora Downtown Historic District |
| Elkader Downtown Historic District |
| Ellis, William and Amanda J., Farmstead Historic District |
| Elmwood-St. Joseph Municipal Cemetery Historic District |
| Evergreen Ridge Stock Farm Historic District |
| Faeth Farmstead and Orchard District |
| Fair Oaks Historic District |
| Fairport Biological Station Historic District |
| Farm Creek Historic District |
| Farm No. 1, Iowa Men's Reformatory |
| Feller, Robert William Andrew, Farmstead |
| Fenelon Place Residential Historic District |
| Fifth Street Bluff Historic District |
| First Avenue East Historic District |
| First Avenue West Historic District |
| Fitch, F.W., Company Historic District |
| Flynn Farm, Mansion, and Barn |
| Forest Park Historic District |
| Fort Atkinson Historic District |
| Fort Des Moines Provisional Army Officer Training School |
| Fort Dodge Downtown Historic District |
| Fort Madison Downtown Commercial Historic District |
| Foster Park Historic District |
| Four Mounds Estate Historic District |
| Fourth Street Historic District |
| Fred Maytag Park Historic District |
| Front Street (River Park Drive) Historic District |
| Fuhrman, Mathias C. and Eva B. Crowell, Farm |
| Garst, Roswell and Elizabeth, Farmstead Historic District |
| Geode State Park, Civilian Conservation Corps Area |
| Gilbert-Linn Street Historic District |
| Glenwood Archeological District |
| Goddard Bungalow Court Historic District |
| Gordon-Van Tine Company Historic District |
| Graham Park Historic District |
| Grand Avenue Historic Commercial District |
| Grand Mound Town Hall and Waterworks Historic District |
| Grant Commercial Historic District |
| "Grant Wood's ""Fall Plowing"" Rural Historic Landscape District" |
| Greater Second Street Historic District |
| Greenfield Public Square Historic District |
| Green, John A., Estate |
| Greenwood Park Plats Historic District |
| Grinnell Historic Commercial District |
| Gull Point State Park, Area A |
| Gull Point State Park, Area B |
| Guttenberg National Fish Hatchery and Aquarium Historic District |
| Hamburg Historic District |
| Hamburg Historic District |
| Hampton Double Square Historic District |
| Hardin County Home Historic District |
| Harlan Courthouse Square Commercial District |
| Harmon and LeValley Northwest Historic District |
| Haymarket Commercial Historic District |
| Helvig-Olson Farm Historic District |
| Herbert Hoover National Historic Site |
| Heritage Hill Historic District |
| Herschler, Christian and Katharina, House, Barn and Outbuildings Historic District |
| Highland Historic District |
| Highland Park Historic Business District at Euclid and Sixth Avenues |
| Historic Railroad District |
| Holy Ghost Catholic Historic District |
| Holy Guardian Angels Church and Cemetery Historic District |
| Hurstville Historic District |
| Ijem Avenue Commercial Historic District |
| Illinois Central Railroad Yard-Cherokee |
| Ingersoll Place Plat Historic District |
| Iowa City Downtown Historic District |
| Iowa Lakeside Laboratory Historic District |
| Iowa Men's Reformatory Historic District |
| Iowa Soldiers' Orphans' Home |
| Iowa State Fair and Exposition Grounds Historic District |
| Iowa State Penitentiary Cellhouses Historic District |
| Jackson Park Historic District |
| Janko, Jan F. and Antonie, Farmstead District |
| Jefferson Square Commercial Historic District |
| Jefferson Street Historic District |
| Johnson County Poor Farm and Asylum Historic District |
| Jones Creek Watershed Historic District |
| Kenny Farmstead Archeological District |
| Kent Union Chapel and Cemetery |
| Kimballton Commercial District |
| Kimballton West 2nd-West 3rd Street Residential District |
| Kingman Place Historic District |
| King Tower Historic District |
| Klinsky Farmstead Historic District |
| Knoxville Veterans Administration Hospital Historic District |
| Knoxville WPA Athletic Field Historic District |
| Kvindherred Lutheran Church, School and Cemetery |
| Kyte, John and Mary Jane, Farmstead 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 Keomah State Park, Bathhouse-Lodge Area (Area A) |
| Lake Keomah State Park, Erosion Control Area (Area B) |
| Lakeside Park Historic District |
Data from United States Park Service and Wikidata
