Obrien is a very rare boys' name that peaked in 1991 and has since faded.
Obrien is a boy name. It last appears in U.S. records in 2022. Obrien first appears in 1921 and peaked in 1991 (16 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2022 | 7 | 7 | #10,561 |
| 2019 | 7 | 7 | #10,507 |
| 2015 | 8 | 8 | #9,334 |
| 2012 | 6 | 6 | #11,860 |
| 2009 | 7 | 7 | #10,666 |
| 2006 | 8 | 8 | #9,329 |
| 2005 | 11 | 11 | #6,983 |
| 2004 | 5 | 5 | #12,698 |
| 2000 | 6 | 6 | #9,974 |
| 1995 | 6 | — | #8,578 |
| 1994 | 11 | — | #5,354 |
| 1993 | 8 | — | #6,658 |
| 1992 | 14 | — | #4,267 |
| 1991 | 16 | — | #3,768 |
| 1990 | 7 | — | #6,956 |
| 1989 | 12 | — | #4,446 |
| 1988 | 13 | — | #3,838 |
| 1987 | 12 | — | #3,900 |
| 1986 | 9 | — | #4,736 |
| 1985 | 9 | — | #4,586 |
| 1984 | 11 | — | #3,862 |
| 1977 | 5 | — | #6,562 |
| 1958 | 6 | — | #3,815 |
| 1921 | 5 | — | #4,796 |