Ja is a rare variant of Jay that peaked in 2000 and has since faded.
Ja is predominantly a boy name. In 2025 it ranked #11,195 for boy births in the United States (and #23,105 across all names), given to 6 babies. Ja was first reported in SSA data in 1957 and peaked in 1999 (20 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 6 | 6 | — | #11,195 |
| 2024 | 8 | 8 | — | #9,354 |
| 2023 | 7 | 7 | — | #10,147 |
| 2022 | 15 | 15 | — | #5,975 |
| 2011 | 6 | 6 | — | #11,394 |
| 2010 | 5 | 5 | — | #13,024 |
| 2008 | 5 | 5 | — | #13,313 |
| 2007 | 5 | 5 | #18,721 | — |
| 2006 | 7 | 7 | — | #9,983 |
| 2005 | 10 | 10 | #17,494 | #12,131 |
| 2004 | 18 | 18 | #14,862 | #6,285 |
| 2003 | 14 | 14 | #16,725 | #7,490 |
| 2002 | 16 | 16 | #14,280 | #6,731 |
| 2001 | 21 | 21 | #14,200 | #4,982 |
| 2000 | 29 | 29 | #7,316 | #4,885 |
| 1999 | 20 | 20 | — | #3,751 |
| 1998 | 12 | 12 | #13,050 | #8,918 |
| 1997 | 7 | — | — | #7,600 |
| 1996 | 5 | — | — | #9,597 |
| 1995 | 17 | — | #10,965 | #5,662 |
| 1994 | 18 | — | #9,103 | #6,042 |
| 1993 | 17 | — | #7,713 | #8,037 |
| 1992 | 5 | — | — | #8,962 |
| 1991 | 16 | — | #8,869 | #6,824 |
| 1989 | 9 | — | — | #5,345 |
| 1986 | 7 | — | — | #5,575 |
| 1985 | 5 | — | — | #6,961 |
| 1984 | 6 | — | — | #5,883 |
| 1983 | 11 | — | — | #3,726 |
| 1982 | 6 | — | — | #5,946 |
| 1981 | 21 | — | #6,031 | #3,969 |
| 1980 | 13 | — | #9,513 | #5,170 |
| 1979 | 18 | — | #10,782 | #3,242 |
| 1978 | 6 | — | — | #5,351 |
| 1977 | 6 | — | — | #5,415 |
| 1976 | 7 | — | — | #4,623 |
| 1974 | 5 | — | — | #5,545 |
| 1971 | 14 | — | #6,871 | #4,145 |
| 1967 | 5 | — | #7,170 | — |
| 1959 | 7 | — | #5,237 | — |
| 1957 | 6 | — | #5,676 | — |