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 2023.
| Name | People | Average Age |
|---|---|---|
| Olivia | 515,589 | 16.4 |
| Olga | 23,390 | 54.5 |
| Olive | 21,952 | 16.4 |
| Octavia | 18,104 | 24.5 |
| Opal | 13,777 | 49.0 |
| Ophelia | 12,728 | 24.8 |
| Oakley | 11,405 | 6.5 |
| Ora | 8,072 | 67.0 |
| Ollie | 8,038 | 56.4 |
| Oaklynn | 7,847 | 2.2 |
| Odessa | 6,500 | 49.8 |
| Ofelia | 5,918 | 46.1 |
| Ola | 5,595 | 70.3 |
| Oaklee | 4,388 | 4.2 |
| Oaklyn | 4,041 | 3.4 |
| Oralia | 4,016 | 57.6 |
| Oriana | 3,612 | 19.0 |
| Odalys | 3,300 | 21.4 |
| Oakleigh | 3,206 | 3.3 |
| Ocean | 3,121 | 8.9 |
| Odette | 2,835 | 26.7 |
| Odalis | 2,588 | 21.7 |
| Olyvia | 2,560 | 15.2 |
| Olympia | 2,306 | 32.1 |
| Ona | 2,286 | 52.0 |
| Oona | 1,609 | 14.9 |
| Oma | 1,503 | 72.9 |
| Onyx | 1,424 | 5.0 |
| Ouida | 1,390 | 72.5 |
| Odelia | 1,330 | 38.6 |
| Oliva | 1,280 | 28.8 |
| Orianna | 1,277 | 14.8 |
| Omega | 1,207 | 35.6 |
| Oneida | 1,171 | 50.1 |
| October | 1,150 | 12.3 |
| Oleta | 1,093 | 73.6 |
| Oceana | 1,064 | 16.2 |
| Oksana | 989 | 25.6 |
| Otilia | 891 | 48.1 |
| Osiris | 840 | 12.8 |
| Orla | 786 | 17.0 |
| Omayra | 783 | 41.1 |
| Odilia | 778 | 55.8 |
| Orly | 764 | 18.2 |
| Ondrea | 763 | 37.2 |
| Orpha | 699 | 71.0 |
| Oliviah | 689 | 11.7 |
| Oscar | 688 | 31.0 |
| Oumou | 685 | 11.4 |
| Ocie | 680 | 63.6 |
| Odyssey | 676 | 15.2 |
| Odell | 657 | 59.4 |
| Onika | 654 | 29.1 |
| Oaklie | 631 | 6.5 |
| Onna | 607 | 25.9 |
| Olivea | 603 | 15.9 |
| Ossie | 578 | 68.0 |
| Orion | 571 | 13.2 |
| Owen | 558 | 14.2 |
| Ozella | 552 | 68.9 |
| Olevia | 550 | 56.9 |
| Onita | 497 | 67.4 |
| Oliver | 467 | 12.0 |
| Olena | 467 | 26.4 |
| Oretha | 459 | 70.4 |
| Orli | 457 | 13.4 |
| Oceanna | 450 | 17.0 |
| Onalee | 442 | 40.0 |
| Olinda | 437 | 59.4 |
| Omar | 436 | 24.4 |
| Ohana | 412 | 5.2 |
| Olivya | 405 | 11.6 |
| Oletha | 387 | 67.4 |
| Oliviana | 384 | 6.7 |
| Omari | 384 | 13.9 |
| Omaira | 382 | 38.2 |
| Oriah | 372 | 9.2 |
| Oluwadarasimi | 371 | 6.3 |
| Ozzie | 363 | 28.7 |
| Otha | 332 | 63.6 |
| Osmara | 325 | 18.8 |
| Orelia | 320 | 61.0 |
| Omni | 306 | 14.3 |
| Olamide | 296 | 13.8 |
| Olimpia | 296 | 35.4 |
| Olina | 290 | 9.1 |
| Ogechi | 285 | 23.5 |
| Ottilie | 284 | 6.9 |
| Otis | 279 | 50.7 |
| Ori | 274 | 13.2 |
| Oluwadamilola | 272 | 13.2 |
| Oliwia | 271 | 13.0 |
| Oni | 271 | 18.7 |
| Otelia | 269 | 72.5 |
| Osha | 268 | 31.0 |
| Oneta | 267 | 78.0 |
| Odaliz | 266 | 21.7 |
| Oasis | 260 | 10.6 |
| Onnie | 256 | 69.7 |
| Odetta | 255 | 63.0 |