Sylvanus is a rare boys' name that peaked in 1915 and has grown less common since.
Sylvanus is a boy name. In 2025 it ranked #13,658 for boy births in the United States (and #28,105 across all names), given to 5 babies. Sylvanus first appears in 1880 and peaked in 1915 (15 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 5 | 5 | #13,658 |
| 2024 | 7 | 7 | #10,787 |
| 2023 | 8 | 8 | #9,634 |
| 2021 | 7 | 7 | #10,657 |
| 2020 | 6 | 6 | #11,852 |
| 2017 | 5 | 5 | #14,005 |
| 2015 | 8 | 8 | #9,456 |
| 2014 | 6 | 6 | #11,930 |
| 2013 | 6 | 6 | #11,969 |
| 2011 | 6 | 6 | #12,083 |
| 2005 | 8 | 8 | #8,985 |
| 2004 | 5 | 5 | #12,978 |
| 2003 | 6 | 6 | #10,702 |
| 2002 | 5 | 5 | #12,261 |
| 2001 | 6 | 6 | #10,385 |
| 2000 | 5 | 5 | #11,903 |
| 1998 | 6 | 6 | #9,499 |
| 1993 | 5 | — | #9,972 |
| 1991 | 5 | — | #9,453 |
| 1986 | 5 | — | #7,690 |
| 1983 | 5 | — | #7,204 |
| 1982 | 9 | — | #4,543 |
| 1980 | 9 | — | #4,458 |
| 1976 | 5 | — | #6,391 |
| 1974 | 5 | — | #5,910 |
| 1970 | 5 | — | #5,355 |
| 1963 | 5 | — | #4,560 |
| 1956 | 6 | — | #3,892 |
| 1953 | 7 | — | #3,398 |
| 1948 | 5 | — | #4,132 |
| 1947 | 7 | — | #3,340 |
| 1946 | 9 | — | #2,672 |
| 1944 | 8 | — | #2,841 |
| 1943 | 5 | — | #3,987 |
| 1942 | 6 | — | #3,525 |
| 1937 | 8 | — | #2,887 |
| 1936 | 6 | — | #3,507 |
| 1934 | 6 | — | #3,638 |
| 1932 | 9 | — | #2,821 |
| 1930 | 5 | — | #4,487 |
| 1929 | 10 | — | #2,744 |
| 1928 | 5 | — | #4,664 |
| 1927 | 11 | — | #2,684 |
| 1926 | 10 | — | #2,888 |
| 1925 | 13 | — | #2,421 |
| 1924 | 7 | — | #3,824 |
| 1923 | 9 | — | #3,149 |
| 1922 | 14 | — | #2,329 |
| 1921 | 7 | — | #3,830 |
| 1920 | 11 | — | #2,743 |
| 1919 | 12 | — | #2,496 |
| 1918 | 8 | — | #3,337 |
| 1917 | 7 | — | #3,511 |
| 1916 | 9 | — | #2,904 |
| 1915 | 15 | — | #1,958 |
| 1914 | 13 | — | #1,855 |
| 1913 | 10 | — | #1,930 |
| 1912 | 7 | — | #2,244 |
| 1904 | 5 | — | #1,381 |
| 1900 | 6 | — | #1,291 |
| 1894 | 8 | — | #848 |
| 1885 | 6 | — | #927 |
| 1883 | 6 | — | #873 |
| 1882 | 6 | — | #933 |
| 1880 | 5 | — | #1,044 |