Isac is an uncommon variant of Isaac that peaked in 2006 and has since faded.
Isac is a boy name. In 2025 it ranked #4,600 for boy births in the United States (and #9,768 across all names), given to 22 babies. Isac first appears in 1884 and peaked in 2006 (148 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 22 | 22 | #4,600 |
| 2024 | 26 | 26 | #4,122 |
| 2023 | 19 | 19 | #5,136 |
| 2022 | 30 | 30 | #3,723 |
| 2021 | 33 | 33 | #3,451 |
| 2020 | 28 | 28 | #3,757 |
| 2019 | 27 | 27 | #3,938 |
| 2018 | 26 | 26 | #4,038 |
| 2017 | 39 | 39 | #3,032 |
| 2016 | 39 | 39 | #3,027 |
| 2015 | 42 | 42 | #2,826 |
| 2014 | 62 | 62 | #2,187 |
| 2013 | 75 | 75 | #1,886 |
| 2012 | 73 | 78 | #1,952 |
| 2011 | 92 | 92 | #1,648 |
| 2010 | 102 | 102 | #1,560 |
| 2009 | 111 | 111 | #1,503 |
| 2008 | 123 | 123 | #1,383 |
| 2007 | 138 | 138 | #1,275 |
| 2006 | 148 | 153 | #1,147 |
| 2005 | 142 | 142 | #1,140 |
| 2004 | 126 | 126 | #1,211 |
| 2003 | 127 | 127 | #1,178 |
| 2002 | 96 | 96 | #1,373 |
| 2001 | 120 | 120 | #1,151 |
| 2000 | 79 | 79 | #1,525 |
| 1999 | 88 | 88 | #1,359 |
| 1998 | 81 | 81 | #1,411 |
| 1997 | 68 | — | #1,526 |
| 1996 | 62 | — | #1,591 |
| 1995 | 56 | — | #1,635 |
| 1994 | 48 | — | #1,805 |
| 1993 | 38 | — | #2,107 |
| 1992 | 39 | — | #2,017 |
| 1991 | 31 | — | #2,314 |
| 1990 | 32 | — | #2,233 |
| 1989 | 21 | — | #2,940 |
| 1988 | 22 | — | #2,642 |
| 1987 | 20 | — | #2,670 |
| 1986 | 18 | — | #2,827 |
| 1985 | 21 | — | #2,457 |
| 1984 | 15 | — | #3,018 |
| 1983 | 17 | — | #2,717 |
| 1982 | 20 | — | #2,463 |
| 1981 | 18 | — | #2,616 |
| 1980 | 20 | — | #2,478 |
| 1979 | 7 | — | #5,048 |
| 1978 | 8 | — | #4,313 |
| 1977 | 9 | — | #3,966 |
| 1976 | 10 | — | #3,585 |
| 1975 | 6 | — | #5,061 |
| 1974 | 7 | — | #4,350 |
| 1973 | 9 | — | #3,553 |
| 1971 | 5 | — | #5,235 |
| 1968 | 5 | — | #4,388 |
| 1966 | 5 | — | #4,204 |
| 1965 | 6 | — | #3,698 |
| 1962 | 5 | — | #4,310 |
| 1956 | 7 | — | #3,347 |
| 1950 | 5 | — | #3,922 |
| 1947 | 5 | — | #3,982 |
| 1943 | 7 | — | #3,083 |
| 1942 | 5 | — | #3,804 |
| 1941 | 5 | — | #3,749 |
| 1939 | 5 | — | #3,716 |
| 1938 | 7 | — | #3,010 |
| 1937 | 7 | — | #3,039 |
| 1936 | 6 | — | #3,338 |
| 1935 | 12 | — | #2,186 |
| 1933 | 8 | — | #2,858 |
| 1932 | 13 | — | #2,145 |
| 1931 | 12 | — | #2,263 |
| 1930 | 11 | — | #2,520 |
| 1929 | 19 | — | #1,756 |
| 1928 | 15 | — | #2,099 |
| 1927 | 14 | — | #2,237 |
| 1926 | 13 | — | #2,359 |
| 1925 | 13 | — | #2,364 |
| 1924 | 12 | — | #2,547 |
| 1923 | 12 | — | #2,519 |
| 1922 | 14 | — | #2,288 |
| 1921 | 20 | — | #1,797 |
| 1920 | 13 | — | #2,391 |
| 1919 | 16 | — | #2,016 |
| 1918 | 19 | — | #1,790 |
| 1917 | 14 | — | #2,133 |
| 1916 | 17 | — | #1,808 |
| 1915 | 21 | — | #1,532 |
| 1914 | 11 | — | #2,036 |
| 1913 | 10 | — | #1,873 |
| 1912 | 9 | — | #1,815 |
| 1911 | 5 | — | #1,870 |
| 1910 | 10 | — | #1,079 |
| 1909 | 5 | — | #1,570 |
| 1908 | 7 | — | #1,159 |
| 1906 | 6 | — | #1,185 |
| 1905 | 5 | — | #1,324 |
| 1903 | 5 | — | #1,207 |
| 1902 | 5 | — | #1,218 |
| 1899 | 5 | — | #1,127 |
| 1892 | 6 | — | #1,016 |
| 1884 | 5 | — | #1,046 |