The baby name Isadore appears in baby name data for the United States from 1910 to 2020. It was most popular in 1916 with 254 babies given the name.
In the later years of this period, Isadore has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 29 |
| 1911 | 57 |
| 1912 | 121 |
| 1913 | 165 |
| 1914 | 213 |
| 1915 | 247 |
| 1916 | 254 |
| 1917 | 228 |
| 1918 | 219 |
| 1919 | 214 |
| 1920 | 174 |
| 1921 | 175 |
| 1922 | 152 |
| 1923 | 138 |
| 1924 | 117 |
| 1925 | 106 |
| 1926 | 81 |
| 1927 | 65 |
| 1928 | 35 |
| 1929 | 26 |
| 1930 | 35 |
| 1931 | 23 |
| 1932 | 14 |
| 1933 | 22 |
| 1934 | 6 |
| 1935 | 23 |
| 1936 | 21 |
| 1937 | 14 |
| 1938 | 20 |
| 1940 | 12 |
| 1942 | 6 |
| 1943 | 5 |
| 1947 | 10 |
| 1948 | 10 |
| 1949 | 5 |
| 1951 | 5 |
| 1952 | 5 |
| 1955 | 6 |
| 2020 | 5 |