Baby names starting with O
The girl and boy names starting with O given most often in the US in 2025.
Updated October 14, 2026 · sources checked October 14, 2026
In short
Among baby names starting with O, the most given in the US in 2025 were Olivia, Oaklynn, Oliver, Owen. The two lists below rank up to 40 girl names and 40 boy names by the number of babies, from Social Security data; use the search box for any other name.
Ranked by the number of babies in 2025.
Girls
- 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
Boys
- 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
About these numbers. Babies born in the United States who received a Social Security number, by year of birth (1980-2025). To protect privacy, the SSA only publishes a name in a given year if at least 5 babies of the same sex received it.
Source: U.S. Social Security Administration — Baby Names from Social Security Card Applications — National Data. Licence: Public domain (work of the U.S. federal government, 17 U.S.C. § 105). Data checked on 2026-10-14. Mamavela only counts and charts these official figures; nothing is estimated.