Casimer
Casimer was last recorded in 2017, when 5 babies were given it; 1,895 Americans have been recorded with it between 1895 and 2017 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Casimer by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Casimer?
Unranked in 2025
Its last boys’ rank on record is #12,602, in 2017; SSA lists a name only in years with 5 or more births.
135 babies in 1918, the peak
Casimer peaked in 1918, when 135 boys were given it, #515 among boys’ names. It was not recorded in 2025.
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2017 | 5 | #12,602 | under 0.01 |
| 2009 | 5 | #12,779 | under 0.01 |
| 1999 | 6 | #8,855 | under 0.01 |
| 1980 | 6 | #5,617 | under 0.01 |
| 1971 | 7 | #4,023 | under 0.01 |
| 1969 | 6 | #4,003 | under 0.01 |
| 1965 | 7 | #3,282 | under 0.01 |
| 1964 | 5 | #4,129 | under 0.01 |
| 1958 | 7 | #3,316 | under 0.01 |
| 1957 | 9 | #2,848 | under 0.01 |
Every recorded year (65)
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 1956 | 8 | #3,004 | under 0.01 |
| 1955 | 8 | #2,999 | under 0.01 |
| 1954 | 11 | #2,475 | 0.01 |
| 1953 | 8 | #2,938 | under 0.01 |
| 1952 | 10 | #2,544 | 0.01 |
| 1951 | 8 | #2,869 | under 0.01 |
| 1950 | 18 | #1,752 | 0.01 |
| 1949 | 12 | #2,241 | 0.01 |
| 1948 | 11 | #2,341 | 0.01 |
| 1947 | 16 | #1,929 | 0.01 |
| 1946 | 7 | #2,950 | under 0.01 |
| 1945 | 14 | #1,861 | 0.01 |
| 1944 | 13 | #2,003 | 0.01 |
| 1943 | 19 | #1,645 | 0.01 |
| 1942 | 16 | #1,810 | 0.01 |
| 1941 | 15 | #1,829 | 0.01 |
| 1939 | 13 | #1,972 | 0.01 |
| 1938 | 9 | #2,509 | 0.01 |
| 1937 | 20 | #1,535 | 0.02 |
| 1936 | 13 | #1,971 | 0.01 |
| 1935 | 9 | #2,558 | 0.01 |
| 1934 | 12 | #2,148 | 0.01 |
| 1933 | 14 | #1,921 | 0.01 |
| 1932 | 26 | #1,360 | 0.02 |
| 1931 | 17 | #1,781 | 0.02 |
| 1930 | 25 | #1,467 | 0.02 |
| 1929 | 30 | #1,298 | 0.03 |
| 1928 | 50 | #964 | 0.05 |
| 1927 | 35 | #1,231 | 0.03 |
| 1926 | 50 | #965 | 0.05 |
| 1925 | 57 | #891 | 0.05 |
| 1924 | 47 | #1,035 | 0.04 |
| 1923 | 84 | #706 | 0.08 |
| 1922 | 73 | #781 | 0.07 |
| 1921 | 102 | #632 | 0.09 |
| 1920 | 111 | #593 | 0.10 |
| 1919 | 94 | #625 | 0.10 |
| 1918 | 135 | #515 | 0.13 |
| 1917 | 127 | #510 | 0.14 |
| 1916 | 105 | #558 | 0.12 |
| 1915 | 102 | #558 | 0.12 |
| 1914 | 80 | #555 | 0.12 |
| 1913 | 50 | #629 | 0.10 |
| 1912 | 30 | #805 | 0.07 |
| 1911 | 25 | #611 | 0.11 |
| 1910 | 19 | #682 | 0.10 |
| 1909 | 14 | #765 | 0.09 |
| 1908 | 6 | #1,238 | 0.04 |
| 1907 | 10 | #879 | 0.07 |
| 1906 | 7 | #1,024 | 0.05 |
| 1905 | 8 | #938 | 0.06 |
| 1901 | 7 | #867 | 0.07 |
| 1900 | 9 | #913 | 0.06 |
| 1899 | 6 | #953 | 0.06 |
| 1895 | 7 | #889 | 0.06 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Casimer a boy’s or a girl’s name?
Casimer has been recorded only for boys: SSA lists no girls with the name in 65 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Casimer: the SSA national file counts each sex separately.
How many people are named Casimer, and how old are they?
An estimated 172 Americans named Casimer and born in the U.S. are alive in 2026 (9% of everyone recorded); the median is 75 years old and half are between 68 and 82. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 357 people named Casimer (0 women and girls, 357 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 244 born in the U.S. The Census count is 46% above that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Where are babies named Casimer born?
The states with the most babies named Casimer are Illinois, New York and Michigan, with 68% of its births recorded by state since 1910.
| State | Since 1910 | Rank, boys | vs. national |
|---|---|---|---|
| Illinois | 312 | not ranked | 3.0× |
| New York | 279 | not ranked | 1.6× |
| Michigan | 233 | not ranked | 3.5× |
| Pennsylvania | 159 | not ranked | 1.0× |
| Ohio | 95 | not ranked | 1.0× |
| New Jersey | 46 | not ranked | 0.8× |
| Indiana | 28 | not ranked | 0.6× |
| Connecticut | 27 | not ranked | 1.0× |
| Massachusetts | 13 | not ranked | 0.2× |
| Wisconsin | 11 | not ranked | 0.2× |
Where Casimer is more common than its national share predicts
Relative to its national share, Casimer is most over-represented in Michigan: since 1910 it was given 3.5 times as often there as its national share each year would predict.
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among boys’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Casimer with the births its national share predicts year by year, for states with at least 100 births of the name.
Names spelled alike
Of these 6 names spelled alike, given to 7,892 babies since 1880, Casimer is the second most given (24% of them). In 2025 none of their 85 babies recorded by SSA was a Casimer (SSA lists a name only with 5 or more babies of one sex).
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Casimer
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Casimer and names like it
- Compare Casimer and CasimirBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1910sCasimer peaked in 1918.
- Illinois’s most given namesThe state where SSA recorded the most babies named Casimer since 1910.
- The top names of 1918The year the most babies were named Casimer.
- The names of the Baby BoomersMost people named Casimer alive today were born 1946-1964.
- Names starting with CMost given first.