| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oak Grove | city | Oklahoma | United States | 36.92 | -94.71 | 898 | |
| Oak Grove | city | Oklahoma | United States | 34.61 | -96.97 | 1148 | |
| Oak Grove | city | Oklahoma | United States | 36.21 | -96.34 | 830 | |
| Oak Hill | city | Oklahoma | United States | 34.04 | -94.84 | 830 | |
| Oak Ridge | city | Oklahoma | United States | 36.90 | -96.11 | 830 | |
| Oak-Ta-Hah (historical) | city | Oklahoma | United States | 35.59 | -95.51 | 830 | |
| Oakhurst | city | Oklahoma | United States | 36.08 | -96.06 | 830 | |
| Oakland | city | Oklahoma | United States | 34.10 | -96.79 | 830 | |
| Oakman | city | Oklahoma | United States | 34.83 | -96.62 | 1007 | |
| Oakridge | city | Oklahoma | United States | 36.08 | -96.04 | 830 | |
| Oaks | city | Oklahoma | United States | 36.17 | -94.85 | 1059 | |
| Oakwood | city | Oklahoma | United States | 35.93 | -98.71 | 1896 | |
| Oberlin | city | Oklahoma | United States | 33.87 | -95.85 | 830 | |
| Ochelata | city | Oklahoma | United States | 36.60 | -95.98 | 830 | |
| Octavia | city | Oklahoma | United States | 34.53 | -94.70 | 846 | |
| Odetta | city | Oklahoma | United States | 34.66 | -98.84 | 1669 | |
| Ogeechee | city | Oklahoma | United States | 36.76 | -94.81 | 830 | |
| Oglesby | city | Oklahoma | United States | 36.63 | -95.86 | 830 | |
| Oil Center | city | Oklahoma | United States | 34.87 | -96.82 | 1099 | |
| Oil City | city | Oklahoma | United States | 34.52 | -98.07 | 1105 | |
| Oil City | city | Oklahoma | United States | 34.27 | -97.42 | 997 | |
| Oilton | city | Oklahoma | United States | 36.08 | -96.58 | 830 | |
| Okarche | city | Oklahoma | United States | 35.73 | -97.98 | 1236 | |
| Okay | city | Oklahoma | United States | 35.85 | -95.32 | 830 | |
| Okeene | city | Oklahoma | United States | 36.12 | -98.32 | 1200 | |
| Okemah | city | Oklahoma | United States | 35.43 | -96.31 | 915 | |
| Okesa | city | Oklahoma | United States | 36.71 | -96.13 | 830 | |
| Okfuskee | city | Oklahoma | United States | 35.60 | -96.23 | 830 | |
| Oklahoma Ceety | city | Oklahoma | United States | 35.47 | -97.52 | 1181 | |
| Oklahoma City | city | Oklahoma | United States | 35.47 | -97.52 | 1181 | |
| Oklahoma Hills | city | Oklahoma | United States | 34.48 | -97.93 | 1082 | |
| Oklahoma Siti | city | Oklahoma | United States | 35.47 | -97.52 | 1181 | |
| Oklahoma Sitis | city | Oklahoma | United States | 35.47 | -97.52 | 1181 | |
| Oklahoma Sitės | city | Oklahoma | United States | 35.47 | -97.52 | 1181 | |
| Oklahoma llaqta | city | Oklahoma | United States | 35.47 | -97.52 | 1181 | |
| Oklahomasitija | city | Oklahoma | United States | 35.47 | -97.52 | 1181 | |
| Oklahomaurbo | city | Oklahoma | United States | 35.47 | -97.52 | 1181 | |
| Oklaxoma Shehiri | city | Oklahoma | United States | 35.47 | -97.52 | 1181 | |
| Okmulgee | city | Oklahoma | United States | 35.62 | -95.96 | 830 | |
| Okoee | city | Oklahoma | United States | 36.52 | -95.09 | 830 | |
| Oktaha | city | Oklahoma | United States | 35.58 | -95.47 | 830 | |
| Old Allison | city | Oklahoma | United States | 33.88 | -96.34 | 830 | |
| Old Bennington | city | Oklahoma | United States | 34.05 | -96.03 | 830 | |
| Old Bliss | city | Oklahoma | United States | 36.55 | -97.14 | 997 | |
| Old Eucha | city | Oklahoma | United States | 36.34 | -94.95 | 905 | |
| Old Farris | city | Oklahoma | United States | 34.24 | -95.88 | 830 | |
| Old Retrop | city | Oklahoma | United States | 35.15 | -99.34 | 1738 | |
| Old Scott | city | Oklahoma | United States | 34.36 | -97.44 | 895 | |
| Oleta | city | Oklahoma | United States | 34.20 | -95.34 | 830 | |
| Olive | city | Oklahoma | United States | 33.91 | -96.45 | 830 | |
| Olive | city | Oklahoma | United States | 36.03 | -96.48 | 895 | |
| Olney | city | Oklahoma | United States | 34.47 | -96.36 | 830 | |
| Olustee | city | Oklahoma | United States | 34.55 | -99.42 | 1669 | |
| Omega | city | Oklahoma | United States | 35.87 | -98.20 | 1200 | |
| Onapa | city | Oklahoma | United States | 35.41 | -95.55 | 830 | |
| Oneida | city | Oklahoma | United States | 35.97 | -98.07 | 1099 | |
| Oneta | city | Oklahoma | United States | 36.02 | -95.71 | 830 | |
| Oologah | city | Oklahoma | United States | 36.45 | -95.71 | 830 | |
| Oowala | city | Oklahoma | United States | 36.42 | -95.61 | 830 | |
| Opah | city | Oklahoma | United States | 36.75 | -96.29 | 898 | |
| Optima | city | Oklahoma | United States | 36.76 | -101.36 | 3349 | |
| Ord | city | Oklahoma | United States | 33.91 | -95.50 | 403 | |
| Orienta | city | Oklahoma | United States | 36.36 | -98.47 | 1240 | |
| Oriental | city | Oklahoma | United States | 35.54 | -96.23 | 830 | |
| Orion | city | Oklahoma | United States | 36.22 | -98.78 | 1751 | |
| Orlando | city | Oklahoma | United States | 36.15 | -97.38 | 1095 | |
| Orr | city | Oklahoma | United States | 34.03 | -97.54 | 830 | |
| Osage | city | Oklahoma | United States | 36.29 | -96.42 | 830 | |
| Osage Junction | city | Oklahoma | United States | 36.54 | -96.72 | 892 | |
| Osage Village (historical) | city | Oklahoma | United States | 36.37 | -95.73 | 830 | |
| Oscar | city | Oklahoma | United States | 33.98 | -97.75 | 830 | |
| Osceola (historical) | city | Oklahoma | United States | 35.75 | -99.18 | 1811 | |
| Oseuma | city | Oklahoma | United States | 36.73 | -94.89 | 830 | |
| Oswalt | city | Oklahoma | United States | 34.03 | -97.33 | 898 | |
| Otoe | city | Oklahoma | United States | 36.38 | -97.18 | 997 | |
| Ottawa | city | Oklahoma | United States | 36.86 | -94.79 | 859 | |
| Overbrook | city | Oklahoma | United States | 34.07 | -97.14 | 830 | |
| Owasso | city | Oklahoma | United States | 36.27 | -95.85 | 830 | |
| Owen | city | Oklahoma | United States | 37.00 | -95.93 | 830 | |
| Ozark | city | Oklahoma | United States | 34.64 | -99.21 | 1669 |