Iowa - Area of significance: Industry
| Adler, E. P., House |
| Albertson and Company-Rocklin Manufacturing Company |
| Armour Creameries Poultry House |
| Best, Louis P. and Clara K., Residence and Auto House |
| Bettendorf, Joseph F., House |
| Birdsall Lime Kiln |
| Bloedel, Christian, Wagon Works |
| Boerner-Fry Company/Davis Hotel |
| Bonaparte Pottery Archeological District |
| Boyt Company Building |
| Burg Wagon Works Building |
| Burnett-Montgomery House |
| Cedar Falls Ice House |
| Cedar Rapids Milk Condensing Company |
| Cedar Rapids Pump Company Factory and Warehouse |
| Cody Road Historic District |
| Court Hill Historic District |
| Crescent Warehouse Historic District |
| Curtis, George M., House |
| Davenport Motor Row and Industrial Historic District |
| Davenport Village |
| Davidson Bros. Company Warehouse and Manufacturing Building |
| Decorah Commercial Historic District |
| Decorah Woolen Mill |
| Downtown Commercial Historic District |
| Dr. Salsbury's Laboratories, Main Office and Production Laboratory Building |
| Dubuque Casket Company |
| Dubuque Millworking Historic District |
| Dubuque Star Brewery |
| Dubuque Trading Post-Village of Kettle Chief Archeological District |
| East Des Moines Industrial Historic District |
| Edel, Matthew, Blacksmith Shop and House |
| Elkader Downtown Historic District |
| Evans Manufacturing Company Building |
| Fifth Street Bluff Historic District |
| Fitch, F.W., Company Historic District |
| Friedl Bakery Building |
| GEO. M. VERITY |
| Gordon-Van Tine Company Historic District |
| Guttenberg Corn Canning Co. |
| Harbach, L. and Sons Furniture Warehouse and Factory Complex |
| Hart, Charles Walter, House |
| Hawthorne Glove and Novelty Company-Shrader Drug Company Building |
| Heritage Hill Historic District |
| Hurstville Historic District |
| Iowa Canning Company Seed House Building |
| Iowa Malleable Iron Company |
| Iowa Wind Mill and Pump Company Office and Warehouse |
| Kahl, Henry, House |
| Kerndt G., and Brothers Elevator and Warehouses, No. 11, No.12 and No. 13 |
| Klindt, George, House |
| Koch, Hans M., House |
| Lamb, Lafayette, House |
| Langworthy Historic District |
| LeClaire, Antoine, House |
| Lime Springs Mill Complex |
| Linograph Company Building, The |
| Littig Brothers/Mengel & Klindt/Eagle Brewery |
| Lock and Dam No. 19 Historic District |
| LONESTAR |
| Louden Machinery Company |
| Louden Monorail System in the Auto Repair Shop |
| Louden, R. B. and Lizzie L., House |
| Louden, R. Bruce and May W., House |
| Louden, R.R., and Antoinette, House |
| Louden Whirl-Around |
| Louden, William and Mary Jane, House |
| Lynnville Mill and Dam |
| Manufacturing and Wholesale Historic District |
| Maquoketa Company-Clinton Machine Company Administration Building |
| McCleery Calendar Factory |
| McKee Button Company |
| McWaid, Job A. and Rebecca E., House |
| Melcher, Dennis Melcher, Pottery and House |
| Metz Manufacturing Company |
| Miller, Severin, House |
| Milwaukee Railroad Shops Historic District |
| Mines of Spain Lead Mining Community Archeological District |
| Mitchell Powerhouse and Dam |
| Motor Mill Historic District |
| Motor Townsite |
| National Biscuit Company Building |
| Newton Downtown Historic District |
| Northwood Central Avenue Historic District |
| Notbohm Mill Archaeological District |
| Osborne, Edmund B., House |
| Painter-Bernatz Mill |
| Parr, Charles Henry, House |
| Peterson Manufacturing Building |
| Pine Creek Gristmill |
| Potter's, E. G., Jasper Flour Mill |
| Primrose Mill |
| Quasdorf Blacksmith and Wagon Shop |
| Rath Packing Company Administration Building |
| Reeve Electric Association Plant |
| Renwick Generating Plant |
| Rhodes Mill |
| Rick's Brewery |
| Rockford Mill |
| Rogers, George W. Company Shot Tower |
Data from United States Park Service and Wikidata
