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 2025.
| Name | People | Average Age |
|---|---|---|
| Olivia | 542,831 | 17.3 |
| Olive | 24,872 | 14.6 |
| Olga | 22,583 | 55.1 |
| Octavia | 20,062 | 23.6 |
| Oakley | 15,231 | 6.8 |
| Ophelia | 14,854 | 21.4 |
| Opal | 14,123 | 42.7 |
| Oaklynn | 11,722 | 3.0 |
| Ollie | 7,483 | 53.9 |
| Ora | 7,461 | 66.6 |
| Odessa | 6,481 | 47.3 |
| Ofelia | 5,925 | 45.5 |
| Oaklee | 5,551 | 5.1 |
| Ola | 5,077 | 70.1 |
| Oaklyn | 5,005 | 4.5 |
| Oakleigh | 4,103 | 4.3 |
| Oralia | 3,879 | 58.5 |
| Oriana | 3,833 | 19.8 |
| Ocean | 3,797 | 8.9 |
| Odalys | 3,378 | 22.8 |
| Odette | 3,299 | 23.9 |
| Olyvia | 2,647 | 16.6 |
| Odalis | 2,612 | 23.4 |
| Olympia | 2,431 | 31.2 |
| Ona | 2,211 | 50.9 |
| Onyx | 1,768 | 5.4 |
| Oona | 1,744 | 15.6 |
| Odelia | 1,401 | 36.1 |
| Orianna | 1,361 | 15.7 |
| Oma | 1,338 | 73.2 |
| Oliva | 1,302 | 29.4 |
| Ouida | 1,259 | 73.2 |
| October | 1,234 | 13.2 |
| Omega | 1,185 | 35.2 |
| Oneida | 1,133 | 51.1 |
| Oceana | 1,131 | 17.1 |
| Oksana | 1,016 | 26.6 |
| Oleta | 971 | 73.9 |
| Orla | 920 | 15.5 |
| Otilia | 889 | 47.1 |
| Osiris | 873 | 13.3 |
| Orly | 813 | 19.0 |
| Omayra | 780 | 43.1 |
| Odilia | 774 | 54.8 |
| Ondrea | 760 | 39.1 |
| Oumou | 754 | 12.3 |
| Oaklie | 744 | 7.3 |
| Odyssey | 727 | 15.9 |
| Oliviah | 712 | 13.2 |
| Onika | 674 | 30.1 |
| Oscar | 671 | 31.6 |
| Ocie | 648 | 62.3 |
| Orpha | 634 | 69.8 |
| Onna | 625 | 26.8 |
| Orion | 620 | 13.7 |
| Olivea | 616 | 17.5 |
| Owen | 610 | 15.0 |
| Odell | 575 | 59.4 |
| Ozella | 518 | 66.9 |
| Ossie | 515 | 68.6 |
| Olevia | 514 | 57.0 |
| Olena | 513 | 24.2 |
| Oliver | 507 | 12.0 |
| Orli | 507 | 13.9 |
| Ohana | 500 | 6.1 |
| Oceanna | 469 | 18.2 |
| Onita | 466 | 68.3 |
| Ozzie | 444 | 26.2 |
| Onalee | 441 | 37.6 |
| Omar | 435 | 25.7 |
| Oretha | 426 | 71.4 |
| Olivya | 425 | 13.0 |
| Olinda | 420 | 60.6 |
| Oliviana | 419 | 8.1 |
| Ottilie | 418 | 5.5 |
| Oriah | 412 | 10.1 |
| Oluwadarasimi | 404 | 7.7 |
| Omari | 396 | 14.9 |
| Omaira | 395 | 38.8 |
| Oletha | 359 | 68.1 |
| Ozzy | 353 | 7.5 |
| Ori | 345 | 13.2 |
| Osmara | 342 | 19.7 |
| Omni | 335 | 14.4 |
| Olina | 318 | 10.2 |
| Olimpia | 314 | 34.4 |
| Orelia | 310 | 59.6 |
| Olamide | 303 | 15.2 |
| Oasis | 303 | 10.4 |
| Otha | 298 | 64.5 |
| Ogechi | 292 | 24.9 |
| Oakland | 291 | 5.0 |
| Oliwia | 288 | 14.1 |
| Olivianna | 287 | 7.5 |
| Oluwadamilola | 282 | 14.5 |
| Oni | 271 | 20.6 |
| Oreoluwa | 269 | 12.0 |
| Osha | 269 | 32.5 |
| Odaliz | 266 | 23.7 |
| Otis | 260 | 50.0 |