Iowa - Area of significance: Transportation
| Lincoln Highway-West Beaver Creek Abandoned Segment |
| Lincoln Highway-West Greene County Rural Segment |
| Lincoln Hotel |
| Lincoln Statue |
| Linden Heights Historic District |
| Lock and Dam No. 11 Historic District |
| Lock and Dam No. 12 Historic District |
| Lock and Dam No. 14 Historic District |
| Lock and Dam No. 16 Historic District |
| Lock and Dam No. 19 Historic District |
| LONESTAR |
| Maine, The |
| Manning Milwaukee Railroad Trestle |
| Marshalltown Downtown Historic District |
| McCaffrey House |
| Melcher, Dennis Melcher, Pottery and House |
| Mills Tower Historic District |
| Milwaukee Railroad Shops Historic District |
| Missouri, Iowa & Nebraska Railway Co. Depot-Weldon |
| Nevada Downtown Historic District |
| New Lawn, The |
| Nishnabotna Ferry House |
| Old Fourth Ward Southeast Historic District |
| Old Mill House |
| Old Town Historic District |
| Owl's Head Historic District |
| Park Motel |
| Polk County Homestead and Trust Company Addition Historic District |
| Rambo House |
| Red Ball Garage |
| "Reynolds, Joseph ""Diamond Jo,"" Office Building and House" |
| Sac City Chicago and North Western Depot |
| Sample, Hugh W. and Sarah, House |
| Sankot Motor Company |
| Sexton Hotel |
| Sherman Hill Historic District |
| Smith, John, House |
| Snake Alley |
| Stringtown House |
| Studebaker Corporation Branch Office Building |
| Suiter, Jacob, House |
| Suiter, John H., House |
| Suiter, William, House |
| Terrace Hill |
| Third Street Bridge (FHWA No. 012250) |
| Trent-Beaver House |
| Tromley, George, Jr., House |
| Tromley, George, Sr., House |
| Union Station and Burlington Freight House |
| Van Den Berg, Hendrik J. and Wilhelmina H., Cottage |
| Van Maren, Henry and Johanna, House-Diamond Filling Station |
| Van Sant, Samuel, House |
| Warnock Building |
| Waverly House |
| WCF & N Center Point Depot and Substation |
| West Ninth Streetcar Line Historic District |
| WILLIAM M. BLACK (dredge) |
| Wilton Commercial Historic District |
| Woodbine Lincoln Highway and Brick Street Historic District |
| Youngville Cafe |
Data from United States Park Service and Wikidata
