Public Sites
| State | County | Name |
|---|---|---|
| Iowa | Clayton | McGregor |
| Iowa | Boone | McHose Park |
| Iowa | Boone | McHugh Wetlands |
| Iowa | Cerro Gordo | McIntosh Woods |
| Iowa | Washington | McKain River Access |
| Iowa | Muscatine | McKeown Bridge River Access |
| Georgia | Bartow | McKinney Campground |
| Michigan | Houghton | McLain State Park |
| Iowa | Winneshiek | Meadow Farm |
| Iowa | Cedar | Meadow Lake Campground |
| Iowa | Adair | Meadow Lake Wildlife Management Area |
| Iowa | Plymouth | Meadow Wildlife Area |
| Iowa | Cedar | Mechanicsville |
| Iowa | Wayne | Medicine Creek Wildlife Area |
| Illinois | Macoupin | Medora |
| Iowa | Warren | Medora Prairie |
| Iowa | Story | Meetz |
| Iowa | Dickinson | Memorial Park, Spirit Lake |
| Iowa | Guthrie | Menlo |
| Iowa | Pocahontas | Meredith Park |
| Illinois | Morgan | Meredosia Hill Prairie Nature Preserve |
| Iowa | Tama | Mericle Woods State Preserve |
| Iowa | Cherokee | Meriden |
| Iowa | Winneshiek | Merlin Moe Park |
| Iowa | Howard | Merricks Pond Access Wildlife Area |