South Dakota cities which start with the letter O.
| Place | Place Type | 2010 Population |
|---|---|---|
| Oacoma | township | 71 |
| Oahe | ||
| Oakwood Lake | ||
| Oelrichs | town | 126 |
| Oglala | ||
| Ohem | ||
| Okaton | township | 46 |
| Okobojo | ||
| Okreek | ||
| Ola | township | 107 |
| Old Town | ||
| Oldham | city | 133 |
| Olivet | town | 74 |
| Olson | ||
| Olsonville | ||
| Onaka | town | 15 |
| Onida | city | 658 |
| Opal | ||
| Oral | ||
| Ordway | township | 300 |
| Orient | township | 49 |
| Orland | township | 93 |
| Ortley | township | 74 |
| Orton | ||
| Ottumwa | ||
| Owanka | township | 28 |
Browse SD Cities by Letter
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