| Lake | County | Latitude | Longitude |
| Rabb Lake | Rolette | 48.995833 | -100.149333 |
| Rabbit City Lake | Rolette | 48.884195 | -100.020746 |
| Rames Lake | Rolette | 48.959451 | -99.873067 |
| Rat Lake | Mountrail | 48.142870 | -102.661526 |
| Red Willow Lake | Griggs | 47.627106 | -98.361157 |
| Rennie Lake | Burke | 48.828986 | -102.523822 |
| Roberts Lake | Benson | 48.105203 | -99.778449 |
| Robinson Lake | Mountrail | 48.139353 | -102.623662 |
| Rock Slough | Burke | 48.564542 | -102.448569 |
| Rosefield Slough | Eddy | 47.611387 | -99.216368 |
| Rosten Slough | Divide | 48.632829 | -103.205748 |
| Ruddy Slough | Burke | 48.638426 | -102.466628 |
| Rudolph Lake | Stutsman | 47.133341 | -98.692904 |
| Rugh Lake | Nelson | 47.774584 | -97.961129 |
| Runner Slough | Stutsman | 46.878671 | -99.132269 |
| Rush Island Lake | Stutsman | 46.960529 | -98.504113 |
| Russell Lake | Foster | 47.380509 | -99.165330 |
| Rutten Lake | McHenry | 48.013297 | -100.340924 |