Sian is a rare name used for both girls and boys that peaked in 2002 and remains in steady use.
Sian is predominantly a girl name. In 2025 it ranked #16,925 among girls (5) and #4,123 among boys (26) — overall #7,856 across all names. The charts below show girls and boys separately.
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 31 | 31 | #16,925 | #4,123 |
| 2024 | 17 | 17 | #12,008 | #8,883 |
| 2023 | 19 | 19 | #14,931 | #6,843 |
| 2022 | 23 | 23 | #8,977 | #7,687 |
| 2021 | 21 | 21 | #13,288 | #6,298 |
| 2020 | 27 | 27 | #7,522 | #6,983 |
| 2019 | 21 | 21 | #8,540 | #9,616 |
| 2018 | 16 | 16 | #12,330 | #9,536 |
| 2017 | 19 | 19 | #9,273 | #10,602 |
| 2016 | 20 | 20 | #10,020 | #8,705 |
| 2015 | 12 | 12 | #9,413 | — |
| 2014 | 16 | 16 | #10,061 | #13,763 |
| 2013 | 11 | 11 | #10,154 | — |
| 2012 | 12 | 12 | #14,768 | #13,918 |
| 2011 | 21 | 21 | #6,308 | — |
| 2010 | 12 | 12 | #16,691 | #11,981 |
| 2009 | 18 | 18 | #7,303 | — |
| 2008 | 36 | 36 | #5,123 | #10,859 |
| 2007 | 29 | 29 | #6,057 | #12,141 |
| 2006 | 35 | 35 | #4,252 | — |
| 2005 | 29 | 29 | #4,687 | — |
| 2004 | 24 | 24 | #5,359 | — |
| 2003 | 23 | 23 | #5,392 | — |
| 2002 | 36 | 36 | #4,487 | #8,330 |
| 2001 | 25 | 25 | #4,818 | — |
| 2000 | 22 | 22 | #6,763 | #10,168 |
| 1999 | 27 | 27 | #5,190 | #9,730 |
| 1998 | 27 | 27 | #4,223 | — |
| 1997 | 15 | — | #6,449 | — |
| 1996 | 11 | — | #8,052 | — |
| 1995 | 17 | — | #8,010 | #8,729 |
| 1994 | 11 | — | #8,061 | — |
| 1993 | 9 | — | #9,430 | — |
| 1992 | 16 | — | #5,971 | — |
| 1991 | 11 | — | #7,910 | — |
| 1990 | 12 | — | #7,246 | — |
| 1989 | 15 | — | #5,804 | — |
| 1988 | 10 | — | #7,607 | — |
| 1987 | 10 | — | #7,279 | — |
| 1986 | 9 | — | #7,676 | — |
| 1985 | 11 | — | #6,404 | — |
| 1984 | 8 | — | #8,049 | — |
| 1983 | 12 | — | #5,778 | — |
| 1982 | 6 | — | #10,320 | — |
| 1981 | 8 | — | #8,035 | — |
| 1980 | 10 | — | #6,711 | — |
| 1979 | 10 | — | #6,629 | — |
| 1978 | 9 | — | #6,864 | — |
| 1977 | 11 | — | #5,837 | — |
| 1976 | 16 | — | #4,128 | — |
| 1975 | 17 | — | #3,920 | — |
| 1974 | 28 | — | #2,675 | — |
| 1973 | 24 | — | #2,905 | — |
| 1971 | 5 | — | #9,418 | — |
| 1970 | 7 | — | #6,959 | — |
| 1969 | 16 | — | #3,598 | — |
| 1967 | 9 | — | #4,926 | — |
| 1966 | 15 | — | #3,383 | — |
| 1965 | 13 | — | #3,712 | — |
| 1964 | 7 | — | #5,925 | — |
| 1963 | 8 | — | #5,229 | — |
| 1962 | 5 | — | #7,433 | — |