The baby name Casimer appears in baby name data for the United States from 1910 to 1951. It was most popular in 1918 with 151 babies given the name.
In the later years of this period, Casimer has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 6 |
| 1911 | 20 |
| 1912 | 25 |
| 1913 | 42 |
| 1914 | 79 |
| 1915 | 100 |
| 1916 | 112 |
| 1917 | 138 |
| 1918 | 151 |
| 1919 | 116 |
| 1920 | 109 |
| 1921 | 118 |
| 1922 | 86 |
| 1923 | 98 |
| 1924 | 50 |
| 1925 | 61 |
| 1926 | 47 |
| 1927 | 28 |
| 1928 | 44 |
| 1929 | 16 |
| 1930 | 12 |
| 1931 | 5 |
| 1932 | 12 |
| 1937 | 6 |
| 1939 | 5 |
| 1941 | 20 |
| 1942 | 21 |
| 1943 | 15 |
| 1944 | 5 |
| 1945 | 5 |
| 1951 | 6 |