Letter O Girl Baby Names 2026
Olivia leads the O-names, followed by "Oak" inspired choices like Oaklynn and Oakley.
| Name | Number of Births |
|---|---|
| Olivia | 13,544 |
| Oaklynn | 1,964 |
| Oakley | 1,933 |
| Olive | 1,597 |
| Ophelia | 1,183 |
| Octavia | 982 |
| Opal | 740 |
| Oaklee | 565 |
| Oaklyn | 456 |
| Oakleigh | 423 |
| Ocean | 345 |
| Odette | 303 |
| Odessa | 193 |
| Onyx | 155 |
| Oriana | 113 |
| Ofelia | 87 |
| Olympia | 84 |
| Ollie | 80 |
| Orla | 70 |
| Ozzy | 70 |
| Oona | 62 |
| Ottilie | 57 |
| Odelia | 56 |
| Oaklie | 54 |
| Orianna | 53 |
| Olga | 50 |
| Oakland | 48 |
| Olyvia | 48 |
| Oceana | 43 |
| Ozzie | 41 |
| October | 40 |
| Ohana | 40 |
| Ora | 40 |
| Odalys | 39 |
| Oumou | 35 |
| Olani | 33 |
| Owen | 33 |
| Ori | 31 |
| Orly | 29 |
| Odyssey | 27 |
| Olivette | 26 |
| Oriyah | 25 |
| Oliver | 24 |
| Oaklynne | 23 |
| Oasis | 23 |
| Olenna | 23 |
| Orli | 22 |
| Olena | 21 |
| Oliviana | 21 |
| Ona | 21 |
For 2025 in the United States, Olivia remains overwhelmingly the most popular girl baby name starting with the letter O, boasting 13,544 births, far surpassing any other name in this category. Following Olivia, a distinct trend towards "Oak" inspired names is evident, with Oaklynn (1,964 births) and Oakley (1,933 births) securing the second and third spots, while other variations like Olive (1,597) and Ophelia (1,183) also show strong popularity, indicating a diverse yet sometimes thematically linked preference among parents for O-starting names.
Data Source: USA Social Security Administration