Casimir is an uncommon boys' name that peaked in 1919 and has grown less common since.
Casimir is a boy name. In 2025 it ranked #2,039 for boy births in the United States (and #4,361 across all names), given to 73 babies. Casimir first appears in 1894 and peaked in 1919 (220 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 73 | 73 | #2,039 |
| 2024 | 59 | 59 | #2,377 |
| 2023 | 58 | 58 | #2,363 |
| 2022 | 58 | 58 | #2,414 |
| 2021 | 40 | 40 | #3,029 |
| 2020 | 29 | 29 | #3,662 |
| 2019 | 29 | 29 | #3,733 |
| 2018 | 31 | 31 | #3,546 |
| 2017 | 24 | 24 | #4,244 |
| 2016 | 29 | 29 | #3,700 |
| 2015 | 34 | 34 | #3,307 |
| 2014 | 31 | 31 | #3,467 |
| 2013 | 37 | 37 | #3,010 |
| 2012 | 23 | 23 | #4,274 |
| 2011 | 22 | 22 | #4,389 |
| 2010 | 24 | 24 | #4,128 |
| 2009 | 22 | 22 | #4,455 |
| 2008 | 28 | 28 | #3,754 |
| 2007 | 25 | 25 | #4,027 |
| 2006 | 15 | 15 | #5,559 |
| 2005 | 23 | 23 | #3,961 |
| 2004 | 23 | 23 | #3,884 |
| 2003 | 14 | 14 | #5,311 |
| 2002 | 23 | 23 | #3,685 |
| 2001 | 11 | 11 | #6,080 |
| 2000 | 16 | 16 | #4,612 |
| 1999 | 13 | 13 | #5,075 |
| 1998 | 14 | 14 | #4,683 |
| 1997 | 19 | — | #3,616 |
| 1996 | 10 | — | #5,593 |
| 1995 | 10 | — | #5,554 |
| 1994 | 12 | — | #4,837 |
| 1993 | 13 | — | #4,477 |
| 1992 | 17 | — | #3,628 |
| 1991 | 9 | — | #5,577 |
| 1990 | 20 | — | #3,073 |
| 1989 | 17 | — | #3,339 |
| 1988 | 11 | — | #4,196 |
| 1987 | 11 | — | #4,006 |
| 1986 | 6 | — | #6,046 |
| 1985 | 15 | — | #3,093 |
| 1984 | 17 | — | #2,715 |
| 1983 | 10 | — | #3,920 |
| 1982 | 15 | — | #2,988 |
| 1981 | 14 | — | #3,053 |
| 1980 | 16 | — | #2,848 |
| 1979 | 10 | — | #3,842 |
| 1978 | 9 | — | #3,901 |
| 1977 | 13 | — | #3,065 |
| 1976 | 9 | — | #3,756 |
| 1975 | 5 | — | #5,582 |
| 1974 | 12 | — | #2,975 |
| 1973 | 10 | — | #3,262 |
| 1972 | 10 | — | #3,189 |
| 1971 | 10 | — | #3,180 |
| 1970 | 11 | — | #2,916 |
| 1969 | 10 | — | #2,890 |
| 1968 | 18 | — | #1,900 |
| 1967 | 11 | — | #2,494 |
| 1966 | 7 | — | #3,283 |
| 1965 | 15 | — | #2,099 |
| 1964 | 12 | — | #2,433 |
| 1963 | 16 | — | #2,051 |
| 1962 | 11 | — | #2,530 |
| 1961 | 17 | — | #2,002 |
| 1960 | 16 | — | #2,051 |
| 1959 | 13 | — | #2,315 |
| 1958 | 22 | — | #1,686 |
| 1957 | 15 | — | #2,105 |
| 1956 | 18 | — | #1,897 |
| 1955 | 24 | — | #1,574 |
| 1954 | 30 | — | #1,386 |
| 1953 | 35 | — | #1,262 |
| 1952 | 31 | — | #1,352 |
| 1951 | 29 | — | #1,381 |
| 1950 | 35 | — | #1,222 |
| 1949 | 29 | — | #1,350 |
| 1948 | 30 | — | #1,326 |
| 1947 | 23 | — | #1,562 |
| 1946 | 27 | — | #1,357 |
| 1945 | 38 | — | #1,041 |
| 1944 | 29 | — | #1,237 |
| 1943 | 37 | — | #1,120 |
| 1942 | 44 | — | #1,010 |
| 1941 | 32 | — | #1,171 |
| 1940 | 36 | — | #1,093 |
| 1939 | 31 | — | #1,172 |
| 1938 | 42 | — | #980 |
| 1937 | 42 | — | #968 |
| 1936 | 39 | — | #1,014 |
| 1935 | 46 | — | #931 |
| 1934 | 51 | — | #881 |
| 1933 | 74 | — | #696 |
| 1932 | 56 | — | #855 |
| 1931 | 72 | — | #721 |
| 1930 | 93 | — | #635 |
| 1929 | 88 | — | #657 |
| 1928 | 98 | — | #618 |
| 1927 | 104 | — | #611 |
| 1926 | 114 | — | #582 |
| 1925 | 123 | — | #558 |
| 1924 | 163 | — | #485 |
| 1923 | 152 | — | #497 |
| 1922 | 168 | — | #477 |
| 1921 | 188 | — | #449 |
| 1920 | 206 | — | #413 |
| 1919 | 220 | — | #395 |
| 1918 | 179 | — | #444 |
| 1917 | 205 | — | #393 |
| 1916 | 181 | — | #414 |
| 1915 | 178 | — | #403 |
| 1914 | 106 | — | #469 |
| 1913 | 95 | — | #437 |
| 1912 | 67 | — | #481 |
| 1911 | 29 | — | #562 |
| 1910 | 17 | — | #732 |
| 1909 | 16 | — | #686 |
| 1908 | 24 | — | #514 |
| 1907 | 12 | — | #779 |
| 1906 | 13 | — | #682 |
| 1905 | 12 | — | #706 |
| 1904 | 6 | — | #1,085 |
| 1903 | 6 | — | #1,032 |
| 1902 | 8 | — | #874 |
| 1901 | 7 | — | #869 |
| 1900 | 7 | — | #1,063 |
| 1899 | 7 | — | #872 |
| 1897 | 5 | — | #1,091 |
| 1896 | 8 | — | #838 |
| 1895 | 6 | — | #997 |
| 1894 | 5 | — | #1,108 |