| Advent & Development of Railroads in Iowa MPS (22) |
| Archaeological Resources of Initial Variant of the Middle Missouri Tradition in Iowa MPS (1) |
| Archaeology of the Wickiup Hill Locality in Linn County, Iowa MPS (6) |
| Archeological Resources of the Central Plains Tradition in the Loess Hills Region of Iowa MPS (2) |
| Architectural Career of William L. Perkins in Iowa:1917-1957 MPS (6) |
| Architectural Legacy of Proudfoot & Bird in Iowa MPS (14) |
| Bungalow, The, and Square House-Des Moines Residential Growth and Development MPS (6) |
| CCC Properties in Iowa State Parks MPS (34) |
| Cedar Rapids, Iowa MPS (6) |
| Centerville MPS (4) |
| Central City, Iowa MPS (2) |
| Clinton, Iowa MPS (5) |
| Commercial & Industrial Development of Cedar Rapids MPS (7) |
| Conservation Movement in Iowa MPS (14) |
| County Courthouses in Iowa TR (73) |
| Davenport MRA (215) |
| Downtown Perry, Iowa MPS (3) |
| Downtown Waterloo MPS (2) |
| Drake University and Related Properties in Des Moines, Iowa, 1881-1918 MPS (15) |
| Dubuque, Iowa MPS (17) |
| Early Settlement and Ethnic Properties of Linn County, Iowa MPS (5) |
| Elkader Downtown MPS (1) |
| Ely, Iowa MPS (1) |
| Ethnic Historic Settlement of Shelby and Audubon Counties MPS (16) |
| Flour Milling in Iowa MPS (2) |
| Footlights in Farm Country: Iowa Opera Houses MPS (4) |
| Grinnell MPS (4) |
| Guttenberg, Iowa MPS (2) |
| Guttenberg MRA (14) |
| Henry County, Iowa MPS (4) |
| Highway Bridges of Iowa MPS (134) |
| Historic Farmsteads of Lyon County MPS (2) |
| Ho-Chunk (Winnebago) Removal to the Neutral Ground MPS (1) |
| Home for Science and Technology: Ames, IA MPS (2) |
| Houses of Mississippi River Men TR (13) |
| Industrial Development of Cedar Rapids, Iowa MPS (1) |
| Iowa City, Iowa MPS AD (5) |
| Iowa City MPS (4) |
| Iowa Falls MPS (10) |
| Iowa Round Barns: The Sixty Year Experiment TR (50) |
| Iowa's Main Street Commercial Architecture MPS (26) |
| Iowa Usonian Houses by Frank Lloyd Wright, 1945-1960, MPS (7) |
| Lake City Iowa MPS (7) |
| Legacy in Stone: The Settlement Era of Madison County, Iowa TR (34) |
| Limestone Architecture of Jackson County MPS (29) |
| Lincoln Highway in Greene County MPS (10) |
| Louden Machinery Company, Fairfield Iowa MPS (10) |
| Maquoketa MPS (24) |
| Mines of Spain Archeological MPS (5) |
| Mount Pleasant MPS (12) |
| Mount Vernon MPS (13) |
| Movie Theaters of Iowa MPS (3) |
| Municipal, County and State Corrections Properties MPS (9) |
| Muscatine, Iowa MPS (2) |
| Muscatine, Iowa MPS AD (1) |
| Nevada Central Business District MPS (1) |
| Norwegian Related Resources of Olive Township, Clinton County, Iowa MPS (3) |
| Oskaloosa MPS (8) |
| Ottumwa MPS (10) |
| Post-Wold War II Development in Ottumwa, Ia 1944-1959 MPS (2) |
| Prairie School Architecture in Mason City TR (14) |
| Prehistoric Hunters and Gatherers on the Northwest Iowa Plains, c. 10,000-200 B.P., MPS (1) |
| Prehistoric Mounds of the Quad-State Region of the Upper Mississippi River Valley MPS (3) |
| Public Library Buildings in Iowa TR (21) |
| Public Library Buildings in Iowa TR;Oskaloosa MPS (1) |
| Public Schools for Iowa: Growth and Change MPS (14) |
| PWA-Era County Courthouses of IA MPS (9) |
| Quaker Testimony in Oskaloosa MPS (14) |
| Religious Properties of Cedar Rapids MPS (2) |
| Sigourney, Iowa MPS (1) |
| Small Homes of Howard F. Moffitt in Iowa City and Coralville MPS (1) |
| Suburban Development in Des Moines Between the World Wars, 1918-1941 MPS (2) |
| The City Beautiful Movement and City Planning in Des Moines, Iowa 1892-1938 MPS (2) |
| Towards a Greater Des Moines MPS (34) |
| Twentieth Century African American Civil Rights-related Resources in Iowa MPS (1) |
| US Senator James F. Wilson Historic Resources MPS (3) |
| Waterloo MPS (9) |
