This is a list of the most common boy names starting with the letter O, based on babies born in the United States in the year 2025.
| Name | Births |
|---|---|
| Oliver | 14,939 |
| Owen | 7,190 |
| Oscar | 1,620 |
| Omar | 1,333 |
| Otto | 1,241 |
| Orion | 1,012 |
| Onyx | 881 |
| Oakley | 688 |
| Odin | 604 |
| Ozzy | 548 |
| Otis | 422 |
| Omari | 397 |
| Ozias | 381 |
| Ocean | 375 |
| Orlando | 275 |
| Oziel | 229 |
| Ollie | 207 |
| Osiris | 200 |
| Osman | 181 |
| Oren | 174 |
| Oakland | 160 |
| Octavio | 154 |
| Osvaldo | 130 |
| Orson | 126 |
| Osiel | 123 |
| Ozzie | 123 |
| Obadiah | 104 |
| Oskar | 93 |
| Orhan | 92 |
| Oziah | 87 |
| Olin | 86 |
| Orin | 85 |
| Oslo | 78 |
| Ori | 76 |
| Oaklee | 75 |
| Oden | 74 |
| Obed | 72 |
| Octavius | 72 |
| Omer | 70 |
| Oswald | 67 |
| Om | 66 |
| Olsen | 66 |
| Oaklen | 62 |
| Orrin | 62 |
| Osmar | 59 |
| Oak | 59 |
| Oakes | 56 |
| Oshea | 54 |
| Osiah | 54 |
| Omarion | 52 |
| Olivier | 52 |
| Octavian | 51 |
| Othniel | 47 |
| Ojas | 46 |
| Odysseus | 44 |
| Oaks | 43 |
| Osias | 43 |
| Oswaldo | 41 |
| Owais | 40 |
| Oseias | 40 |
| Oumar | 38 |
| Oryan | 36 |
| Othman | 34 |
| Olen | 33 |
| Oz | 33 |
| Omri | 32 |
| Ousmane | 31 |
| Olson | 30 |
| Ollivander | 30 |
| Obi | 29 |
| Opie | 29 |
| Omega | 27 |
| Oaklan | 25 |
| Ovidio | 24 |
| Oseas | 24 |
| Oriel | 24 |
| Olliver | 24 |
| Oaklyn | 23 |
| Oleander | 23 |
| Ostin | 23 |
| Odell | 23 |
| Omid | 23 |
| Osborne | 22 |
| Onix | 22 |
| Oisin | 22 |
| Orlin | 22 |
| Olvin | 21 |
| Omir | 21 |
| Ole | 21 |
| Oaken | 20 |
| Odyn | 20 |
| Oran | 19 |
| Osama | 18 |
| Olivander | 18 |
| Odie | 17 |
| Obaida | 17 |
| Ociel | 17 |
| Oberon | 17 |
| Onyxx | 17 |
| Octavious | 17 |