| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Nahant | city | South Dakota | United States | 44.17667 | -103.755 | 5770 | 171 |
| Nahon | city | South Dakota | United States | 45.38556 | -98.40611 | 1302 | 2589 |
| Naomi | city | South Dakota | United States | 43.33056 | -96.92417 | 1328 | 913 |
| Napa Junction | city | South Dakota | United States | 42.94111 | -97.45333 | 1371 | 6008 |
| Naples | city | South Dakota | United States | 44.77167 | -97.51139 | 1742 | 188 |
| Nemo | city | South Dakota | United States | 44.19417 | -103.50444 | 4606 | 170 |
| New Effington | city | South Dakota | United States | 45.85639 | -96.92 | 1079 | 224 |
| New Elm Springs Colony | city | South Dakota | United States | 43.48889 | -97.82861 | 1299 | 521 |
| New Holland | city | South Dakota | United States | 43.42722 | -98.60889 | 1587 | 354 |
| New Underwood | city | South Dakota | United States | 44.09333 | -102.83583 | 2831 | 76 |
| Newark | city | South Dakota | United States | 45.92944 | -97.79111 | 1305 | 218 |
| Newell | city | South Dakota | United States | 44.71472 | -103.42028 | 2805 | 56 |
| Nihart | city | South Dakota | United States | 43.65639 | -103.59056 | 5196 | 373 |
| Nisland | city | South Dakota | United States | 44.67306 | -103.55306 | 2818 | 56 |
| Nora | city | South Dakota | United States | 42.93917 | -96.70667 | 1414 | 789 |
| Norbeck | city | South Dakota | United States | 45.18417 | -99.21222 | 1650 | 109 |
| Norris | city | South Dakota | United States | 43.47333 | -101.19583 | 2499 | 61 |
| North Eagle Butte | city | South Dakota | United States | 45.00417 | -101.23333 | 2424 | 86 |
| North Grove Addition | city | South Dakota | United States | 44.43139 | -96.78806 | 1709 | 452 |
| North Shore | city | South Dakota | United States | 44.94861 | -97.20639 | 1679 | 3215 |
| North Sioux City | city | South Dakota | United States | 42.52722 | -96.48278 | 1115 | 21836 |
| North Spearfish | city | South Dakota | United States | 44.50667 | -103.89167 | 3641 | 4653 |
| Northshore Development | city | South Dakota | United States | 42.86667 | -97.52778 | 1207 | 3153 |
| Northville | city | South Dakota | United States | 45.15556 | -98.57889 | 1286 | 131 |
| Norton Acres | city | South Dakota | United States | 43.57722 | -96.70417 | 1328 | 59464 |
| Norway Center | city | South Dakota | United States | 43.12722 | -96.62806 | 1453 | 476 |
| Novak | city | South Dakota | United States | 44.21639 | -103.55139 | 4999 | 248 |
| Nowlin | city | South Dakota | United States | 44.04972 | -101.30222 | 2001 | 56 |
| Nunda | city | South Dakota | United States | 44.16222 | -97.01861 | 1715 | 268 |
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