| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Oo-moo-chah historical | city | California | United States | 38.40833 | -121.37083 | 39 | 28498 |
| Ookala | city | Hawaii | United States | 20.0175 | -155.28722 | 567 | 117 |
| Oolite | city | Kentucky | United States | 38.06778 | -86.28 | 695 | 1704 |
| Oolitic | city | Indiana | United States | 38.90083 | -86.52528 | 488 | 11518 |
| Oologah | city | Oklahoma | United States | 36.44694 | -95.70806 | 656 | 1869 |
| Ooltewah | city | Tennessee | United States | 35.075 | -85.06222 | 1079 | 18681 |
| Oostanaula | city | Georgia | United States | 34.48139 | -85.01444 | 600 | 6349 |
| Oostburg | city | Wisconsin | United States | 43.62278 | -87.79444 | 698 | 4721 |
| Oot Park | city | New York | United States | 43.06444 | -76.03056 | 498 | 34760 |
| Oowala | city | Oklahoma | United States | 36.42333 | -95.61444 | 679 | 2925 |
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