Iowa - Area of significance: Social History
| Adair County Democrat-Adair County Free Press Building |
| Alden Public Library |
| Amana Villages |
| Antioch School |
| Atlantic High School |
| Audubon County Home Historic District |
| 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, George A. and Mary Tinkel, House |
| Bailey, William H. and Alice, House |
| Beeds Lake State Park, Civilian Conservation Corps Area |
| Benjamin Chapel and Richwoods Cemetery |
| Bennington No. 4 |
| Bentonsport |
| Bethel African Methodist Episcopal Church |
| Bethel AME Church |
| Bicksler Block |
| Black Hawk County Soldiers Memorial Hall |
| 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 |
| Bloomfield Square |
| B'nai Jacob Synagogue |
| Bohemian Commercial Historic District |
| Booth, Edmund and Mary Ann Walworth, House |
| Brazelton House Hotel |
| Burns United Methodist Church |
| Carnegie-Ellsworth Public Library |
| Carpenter, James Sansom, House |
| Carroll City-Mount Olivet Cemetery |
| Cattermole Memorial Library |
| Caulkins, Dr. Martin H., House and Office |
| Caviness, Carl L., Post 102, American Legion |
| Cedar Falls Independent Order of Odd Fellows |
| Central Park-North Main Street Historic District |
| Chautauqua Park |
| Chautauqua Park Historic District |
| Cherokee Public Library |
| Chevra B'nai Yisroel Synagogue |
| Chief Black Hawk Statue |
| Clark, Alexander, House |
| Clinton Public Library |
| Coal Ridge Baptist Church and Cemetery |
| Coffin, Lorenzo S., Burial Plot |
| Colfax Spring City Commercial Historic District |
| Collins-Bond House |
| Community Building |
| Conger, Jonathan Clark, House |
| Cook, Clarissa, Home for the Friendless |
| Cottage Grove Avenue Presbyterian Church |
| Cranford Apartment Building |
| Crapo Park and Arboretum Historic District |
| Craven, J. D., Women's Relief Corps Hall |
| Cresco Opera House |
| C.S.P.S. Hall |
| Czecho Slovakian Association Hall |
| Darwin, Mary, House |
| Davenport Crematorium |
| Davenport Downtown Commercial Historic District |
| Decorah Commercial Historic District |
| Decorah Hospital |
| Decorah Municipal Bathhouse and Swimming Pool |
| Denmark Congregational Church |
| Dils-Downer House |
| Dodd, A. B. C., House |
| Dolliver Memorial State Park, Entrance Area (Area A) |
| Dolliver Memorial State Park, Picnic, Hiking & Maintenance Area (Area B) |
| Dubuque County Jail |
| Dubuque, Julien, Monument |
| Dubuque YMCA Building |
| Eagle Point Park Historic District |
| Edgewood School of Domestic Arts |
| Elmwood-St. Joseph Municipal Cemetery Historic District |
| Ericson Public Library |
| Fairfield Public Library |
| Fairview Church and Cemetery |
| Farm Creek Historic District |
| Fire Station No. 2 |
| First Christian Church |
| First Congregational Church |
| First Johnson County Asylum |
| First Methodist Episcopal Church |
| First Welsh Congregational Church |
| Flynn-Griffin Building |
| Folkert Mound Group |
| Franklin County G. A. R. Soldiers' Memorial Hall |
| Fred Maytag Park Historic District |
| Frick's Tavern |
| G.A.R. Memorial Hall |
| Garretson, Owen A. and Emma J., House |
| Garst, Roswell and Elizabeth, Farmstead Historic District |
| Geode State Park, Civilian Conservation Corps Area |
| German Methodist Episcopal Church |
| Goering, Jacob, House |
| Graham Park Historic District |
| Grand Mound Town Hall and Waterworks Historic District |
| Grandview Park Music Pavilion |
| Greenwood Cemetery Chapel |
Data from United States Park Service and Wikidata
