| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Oak Valley | city | Rhode Island | United States | 41.96556 | -71.60028 | 298 | 14907 |
| Oakland | city | Rhode Island | United States | 41.95722 | -71.64833 | 308 | 13156 |
| Oakland Beach | city | Rhode Island | United States | 41.6925 | -71.39944 | 3 | 58428 |
| Oaklawn | city | Rhode Island | United States | 41.75194 | -71.47778 | 98 | 133800 |
| Old Harbor Landing | city | Rhode Island | United States | 41.16611 | -71.54917 | 16 | 704 |
| Olneyville | city | Rhode Island | United States | 41.81472 | -71.44694 | 45 | 249325 |
| Omega historical | city | Rhode Island | United States | 41.835 | -71.36139 | 19 | 155225 |
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