| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ragged Top (historical) | city | South Dakota | United States | 44.36 | -103.89 | 6020 | |
| Ralph | city | South Dakota | United States | 45.78 | -103.07 | 2769 | |
| Ramona | city | South Dakota | United States | 44.12 | -97.22 | 1758 | |
| Randolph | city | South Dakota | United States | 45.24 | -98.21 | 1669 | |
| Rapid City | city | South Dakota | United States | 44.08 | -103.23 | 3349 | |
| Rapid Valley | city | South Dakota | United States | 44.06 | -103.15 | 3349 | |
| Rauville | city | South Dakota | United States | 44.98 | -97.11 | 1748 | |
| Ravinia | city | South Dakota | United States | 43.14 | -98.43 | 1669 | |
| Raymond | city | South Dakota | United States | 44.91 | -97.94 | 1669 | |
| Red Elm | city | South Dakota | United States | 45.06 | -101.78 | 2509 | |
| Red Scaffold | city | South Dakota | United States | 44.77 | -101.84 | 1981 | |
| Red Shirt | city | South Dakota | United States | 43.67 | -102.90 | 2798 | |
| Red Willow Colony | city | South Dakota | United States | 44.53 | -96.73 | 1774 | |
| Redfern | city | South Dakota | United States | 44.00 | -103.64 | 5869 | |
| Redfield | city | South Dakota | United States | 44.88 | -98.52 | 1669 | |
| Redig | city | South Dakota | United States | 45.27 | -103.55 | 3349 | |
| Redowl | city | South Dakota | United States | 44.70 | -102.55 | 2785 | |
| Ree Heights | city | South Dakota | United States | 44.52 | -99.20 | 1748 | |
| Reliance | city | South Dakota | United States | 43.88 | -99.60 | 1755 | |
| Renner | city | South Dakota | United States | 43.65 | -96.73 | 1669 | |
| Renner Corner | city | South Dakota | United States | 43.65 | -96.71 | 1669 | |
| Reno | city | South Dakota | United States | 43.91 | -103.62 | 5869 | |
| Reppert Addition | city | South Dakota | United States | 43.57 | -96.79 | 1669 | |
| Reva | city | South Dakota | United States | 45.55 | -103.08 | 3349 | |
| Revillo | city | South Dakota | United States | 45.02 | -96.57 | 1184 | |
| Richfield Heights | city | South Dakota | United States | 45.51 | -98.54 | 1669 | |
| Richland | city | South Dakota | United States | 42.76 | -96.65 | 1135 | |
| Richmond | city | South Dakota | United States | 45.52 | -98.62 | 1669 | |
| Richmond Heights | city | South Dakota | United States | 45.51 | -98.57 | 1669 | |
| Richmond Lake Heights Development | city | South Dakota | United States | 45.54 | -98.58 | 1669 | |
| Ridgeland Heights | city | South Dakota | United States | 44.08 | -103.36 | 4189 | |
| Ridgeview | city | South Dakota | United States | 45.08 | -100.80 | 2509 | |
| River Bluff Addition | city | South Dakota | United States | 43.73 | -98.07 | 1669 | |
| Riverside | city | South Dakota | United States | 43.72 | -97.95 | 1669 | |
| Riverside (historical) | city | South Dakota | United States | 43.02 | -97.01 | 1164 | |
| Riverside Colony | city | South Dakota | United States | 44.49 | -98.14 | 1246 | |
| Rochford | city | South Dakota | United States | 44.12 | -103.72 | 5377 | |
| Rockerville | city | South Dakota | United States | 43.96 | -103.36 | 4422 | |
| Rockham | city | South Dakota | United States | 44.90 | -98.82 | 1669 | |
| Rockport Colony | city | South Dakota | United States | 43.58 | -97.84 | 1236 | |
| Rocky Ford | city | South Dakota | United States | 43.29 | -103.60 | 3398 | |
| Rockyford | city | South Dakota | United States | 43.50 | -102.50 | 2690 | |
| Roland Colony | city | South Dakota | United States | 44.34 | -96.59 | 1712 | |
| Roscoe | city | South Dakota | United States | 45.45 | -99.34 | 1811 | |
| Rosebud | city | South Dakota | United States | 43.23 | -100.85 | 2700 | |
| Rosholt | city | South Dakota | United States | 45.87 | -96.73 | 1066 | |
| Roslyn | city | South Dakota | United States | 45.50 | -97.49 | 1863 | |
| Roswell | city | South Dakota | United States | 44.01 | -97.70 | 1669 | |
| Roubaix | city | South Dakota | United States | 44.28 | -103.67 | 5869 | |
| Rousseau | city | South Dakota | United States | 44.32 | -100.07 | 1669 | |
| Rowena | city | South Dakota | United States | 43.52 | -96.56 | 1669 | |
| Rudebusch Corner | city | South Dakota | United States | 45.43 | -97.15 | 1952 | |
| Rudolph | city | South Dakota | United States | 45.35 | -98.54 | 1669 | |
| Rumford | city | South Dakota | United States | 43.13 | -103.70 | 3599 | |
| Rumpus Ridge | city | South Dakota | United States | 43.58 | -97.19 | 1669 | |
| Runkel (historical) | city | South Dakota | United States | 44.30 | -103.53 | 5029 | |
| Running Water | city | South Dakota | United States | 42.77 | -97.98 | 1210 | |
| Ruskin Park | city | South Dakota | United States | 44.01 | -98.10 | 1197 | |
| Rustic Acres Colony | city | South Dakota | United States | 43.87 | -97.09 | 1722 | |
| Rutland | city | South Dakota | United States | 44.09 | -96.97 | 1669 |