This is a list of the most common female names starting with the letter O, based on people currently estimated to be alive in the United States as of 2022.
| Name | People | Average Age |
|---|---|---|
| Olivia | 500,812 | 15.9 |
| Olga | 23,815 | 54.2 |
| Olive | 20,577 | 17.7 |
| Octavia | 17,029 | 25.3 |
| Opal | 13,764 | 52.0 |
| Ophelia | 11,715 | 27.1 |
| Oakley | 9,527 | 6.6 |
| Ora | 8,396 | 67.2 |
| Ollie | 8,310 | 57.7 |
| Odessa | 6,573 | 50.6 |
| Oaklynn | 6,031 | 1.8 |
| Ofelia | 5,943 | 46.2 |
| Ola | 5,871 | 70.3 |
| Oralia | 4,082 | 57.1 |
| Oaklee | 3,700 | 3.9 |
| Oaklyn | 3,526 | 2.9 |
| Oriana | 3,484 | 18.7 |
| Odalys | 3,273 | 20.6 |
| Ocean | 2,787 | 9.1 |
| Odette | 2,666 | 27.9 |
| Oakleigh | 2,606 | 3.1 |
| Odalis | 2,571 | 20.8 |
| Olyvia | 2,513 | 14.4 |
| Ona | 2,326 | 52.7 |
| Olympia | 2,257 | 32.4 |
| Oma | 1,592 | 72.7 |
| Oona | 1,526 | 14.8 |
| Ouida | 1,459 | 72.2 |
| Odelia | 1,309 | 39.6 |
| Oliva | 1,273 | 28.5 |
| Orianna | 1,245 | 14.2 |
| Onyx | 1,231 | 5.2 |
| Omega | 1,217 | 35.9 |
| Oneida | 1,181 | 50.1 |
| Oleta | 1,159 | 73.4 |
| October | 1,098 | 12.1 |
| Oceana | 1,030 | 15.7 |
| Oksana | 968 | 25.3 |
| Otilia | 895 | 48.5 |
| Osiris | 826 | 12.7 |
| Omayra | 784 | 40.1 |
| Odilia | 784 | 56.0 |
| Ondrea | 765 | 36.2 |
| Orly | 743 | 17.7 |
| Orpha | 736 | 71.4 |
| Orla | 721 | 18.1 |
| Odell | 702 | 59.3 |
| Ocie | 700 | 64.0 |
| Oscar | 697 | 30.6 |
| Oliviah | 678 | 10.9 |
| Oumou | 665 | 10.8 |
| Odyssey | 650 | 14.9 |
| Onika | 647 | 28.4 |
| Ossie | 612 | 67.7 |
| Olivea | 602 | 15.0 |
| Onna | 599 | 25.4 |
| Oaklie | 590 | 6.0 |
| Ozella | 579 | 68.7 |
| Olevia | 569 | 56.9 |
| Orion | 548 | 12.8 |
| Owen | 530 | 13.8 |
| Onita | 513 | 66.9 |
| Oretha | 475 | 69.9 |
| Olena | 446 | 27.6 |
| Olinda | 445 | 58.8 |
| Oliver | 445 | 12.2 |
| Onalee | 441 | 41.5 |
| Omar | 437 | 23.8 |
| Oceanna | 436 | 16.5 |
| Orli | 435 | 13.0 |
| Oletha | 401 | 67.1 |
| Olivya | 396 | 10.9 |
| Omari | 376 | 13.5 |
| Omaira | 375 | 38.1 |
| Oliviana | 361 | 6.2 |
| Ohana | 358 | 5.0 |
| Otha | 349 | 63.2 |
| Oluwadarasimi | 345 | 5.8 |
| Oriah | 338 | 9.1 |
| Orelia | 325 | 61.7 |
| Ozzie | 319 | 30.4 |
| Osmara | 313 | 18.5 |
| Olamide | 290 | 13.3 |
| Olimpia | 290 | 35.7 |
| Omni | 290 | 14.2 |
| Otis | 290 | 51.2 |
| Oneta | 286 | 77.7 |
| Ogechi | 285 | 22.5 |
| Otelia | 281 | 72.1 |
| Olina | 273 | 8.7 |
| Osha | 269 | 30.0 |
| Odaliz | 266 | 20.7 |
| Oluwadamilola | 266 | 12.6 |
| Oliwia | 264 | 12.3 |
| Oni | 264 | 18.6 |
| Onnie | 264 | 70.1 |
| Odetta | 262 | 62.5 |
| Onica | 254 | 28.8 |
| Oneisha | 247 | 27.2 |
| Oasis | 244 | 10.7 |