Public Sites
| State | County | Name |
|---|---|---|
| Iowa | Tama | Union Grove State Park |
| Iowa | Tama | Union Grove Wildlife Area |
| Iowa | Polk | Union Labor Park |
| Iowa | Mahaska | Union Mills Access - North Skunk River |
| Iowa | Polk | Union Park |
| Iowa | Kossuth | Union Slough National Wildlife Refuge |
| Iowa | Appanoose | Unionville |
| Iowa | Johnson | University Heights |
| Iowa | Johnson | University Hospitals |
| Iowa | Black Hawk | University of Northern Iowa |
| Iowa | Winneshiek | Upper Iowa River - Upper Dam |
| Iowa | Fayette | Upper Iowa University |
| Iowa | Benton | Urbana |
| Iowa | Polk | Urbandale |
| Iowa | Winneshiek | US-52 Project |
| Iowa | Allamakee | USFW Office McGregor |
| Iowa | Crawford | Vail |
| Nebraska | Cherry | Valentine National Wildlife Refuge |
| Texas | Hidalgo | Valley Nature Center |
| Iowa | Dallas | Valley View Park |
| Iowa | Van Buren | Van Buren County |
| Iowa | Van Buren | Van Buren County |
| Iowa | Van Buren | Van Buren Wildlife Area |
| Iowa | Mills | Van Eaton Cemetery |
| Iowa | Linn | Van Vechten Park |