List of National Historic Landmarks in Iowa
The List of National Historic Landmarks in Iowa contains the landmarks designated by the U.S. Federal Government for the U.S. state of Iowa.
There are 29 National Historic Landmarks in Iowa.
;Key
| National Historic Landmark | |
| National Historic Landmark District | |
| National Historical Park | |
| § | National Historic Site |
| Delisted Landmark |
Former Iowa NHLs
- President (steamboat) formerly in Davenport, Iowa, relocated to Mississippi and thence to Alton, Illinois