Iowa - Role: District
| 100 Block of West Broadway Historic District |
| Acadian Manor Historic District |
| Adel Public Square Historic District |
| Albia Square and Central Commercial Historic District |
| Alleman, Richard L. and Verda M., Farm Historic District |
| Amana Villages |
| American School of Wild Life Protection Historic District |
| Ames Main Street Historic District |
| Anamosa Main Street Historic District |
| Architecture of Henry K. Holsman Historic Campus District |
| Ashby Manor Historic District |
| Ash Park Historic District |
| Aspen Grove Cemetery Historic District |
| Atchison, Topeka and Santa Fe Passenger and Freight Complex Historic District |
| Audubon County Home Historic District |
| Backbone State Park, Cabin-Bathing Area (Area A) |
| Backbone State Park Historic District |
| Backbone State Park, Picnicking, Hiking & Camping Area (Area B) |
| Backbone State Park, Richmond Springs (Area C) |
| Bandshell Park Historic District |
| Bates Park Historic District |
| B Avenue NE Historic District |
| Baxter, H.A., Coal Company Historic District |
| Bedford Commercial Historic District |
| Beeds Lake State Park, Civilian Conservation Corps Area |
| Beers and St. John Company Coach Inn |
| Belfrage, W.L. and Winnie (Woodford), Farmstead Historic District |
| Belle Plaine Main Street Historic District |
| Bellevue Commercial Historic District |
| Bentonsport |
| Bever Woods Historic District |
| Big Sioux Prehistoric Prairie Procurement System Archaeological District |
| Blackhawk State Park, Black Hawk Preserve (Area B) |
| Blackhawk State Park, Wildlife Preserve Area (Area A) |
| Bloomfield Square |
| Bohemian Commercial Historic District |
| Bohemian Commercial Historic District |
| Bonaparte Historic Riverfront District |
| Bonaparte Pottery Archeological District |
| Boyle, Hugh and Matilda, House and Cemetery Historic District |
| Bridge Avenue Historic District |
| Briggs Terrace |
| Broad View Ranch Historic District |
| Broadway-Phelps Park Historic District |
| Brown Street Historic District |
| Brugjeld-Peterson Family Farmstead District |
| Burlington, Cedar Rapids, and Northern Railroad-Rock Rapids Station, Railroad Track and Bridge |
| Business Part of Olin Historic District |
| Byal Orchard Historic District |
| Camp Dodge Pool District |
| Camp Harlan-Camp McKean Historic District |
| Carroll City-Mount Olivet Cemetery |
| Castle Terrace Historic District |
| Cathedral Historic District |
| Cedar Falls Downtown Historic District |
| Cedar Rapids 2nd Avenue SE. Automobile Row Historic District |
| Cedar Rapids Central Business District Commercial Historic District |
| Central City Commercial Historic District |
| Central Park-North Main Street Historic District |
| Central Vinton Residential Historic District |
| Chariton Cemetery Historic District |
| Chautauqua Park Historic District |
| Chautauqua Park Historic District |
| Cherokee Commercial Historic District |
| Civic Center Historic District |
| Cody Road Historic District |
| Coggon Commercial Historic District |
| Colfax Spring City Commercial Historic District |
| College Corner Commercial Historic Business District |
| College Green Historic District |
| College Square Historic District |
| Collegiate Neighborhood Historic District |
| Columbia Avenue Historic District |
| Cork Hill District |
| Cornell College-Mount Vernon Historic District |
| Corning Commercial Historic District |
| Court Hill Historic District |
| Courthouse Square Historic District |
| Crapo Park and Arboretum Historic District |
| Crescent Warehouse Historic District |
| Davenport Downtown Commercial Historic District |
| Davenport Motor Row and Industrial Historic District |
| Davenport Village |
| Dayton Stagecoach Inn and Tavern Historic District |
| Decorah Commercial Historic District |
| Dolliver Memorial State Park, Picnic, Hiking & Maintenance Area (Area B) |
| Downtown Commercial Historic District |
| Downtown Commercial Historic District |
| Dows Street Historic District |
| Dowtown Perry Historic District |
| Drake University Campus Historic District |
| Dubuque Millworking Historic District |
| Dubuque Trading Post-Village of Kettle Chief Archeological District |
| Duncan-Duitsman Farm Historic District |
| Eagle Point Park Historic District |
| East 14th Street Historic District |
| East College Street Historic District |
| East Des Moines Commercial Historic District |
| East Des Moines Industrial Historic District |
| East Park Historic District |
Data from United States Park Service and Wikidata
