Public Sites
| State | County | Name |
|---|---|---|
| Iowa | Johnson | Hanging Rock Ridge Wildlife Area |
| Iowa | Dallas | Hanging Rock Park |
| Iowa | Linn | Hanging Bog State Preserve |
| Iowa | Hancock | Hancock County |
| Iowa | Jackson | Hamilton Prairie, Jackson County |
| Iowa | Adams | Hamilton Prairie, Adams County |
| Iowa | Hamilton | Hamilton County |
| Iowa | Jones | Hamilton and Tapken Prairie Preserve |
| Iowa | Fremont | Hamburg |
| Iowa | Story | Hallet's Quarry |
| Iowa | Dickinson | Hales Slough Wildlife Management Area |
| Iowa | Jones | Hale Wildlife Area |
| Florida | Polk | Haines City Park |
| Iowa | Sac | Hagge County Park |
| Iowa | Clinton | Hagenson Pond Area |
| Iowa | Winnebago | Hadacek Recreation Area |
| Iowa | Montgomery | Hacklebarney Woods County Park |
| Michigan | Marquette | Gwinn Cemetery |
| Iowa | Madison | Guye Woods County Park |
| Iowa | Clayton | Guttenberg |
| Iowa | Guthrie | Guthrie County |
| Iowa | Guthrie | Guthrie Center |
| Iowa | Dickinson | Gull Point State Park |
| Mississippi | Jackson | Gulf Shores National Seashore |
| Iowa | Grundy | Grundy County |