The baby name Dorthy appears in baby name data for the United States from 1910 to 1982. It was most popular in 1930 with 932 babies given the name.
In the later years of this period, Dorthy has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 23 |
| 1911 | 25 |
| 1912 | 78 |
| 1913 | 139 |
| 1914 | 145 |
| 1915 | 275 |
| 1916 | 371 |
| 1917 | 390 |
| 1918 | 565 |
| 1919 | 469 |
| 1920 | 545 |
| 1921 | 581 |
| 1922 | 579 |
| 1923 | 535 |
| 1924 | 663 |
| 1925 | 769 |
| 1926 | 795 |
| 1927 | 885 |
| 1928 | 921 |
| 1929 | 862 |
| 1930 | 932 |
| 1931 | 757 |
| 1932 | 752 |
| 1933 | 768 |
| 1934 | 690 |
| 1935 | 820 |
| 1936 | 514 |
| 1937 | 568 |
| 1938 | 470 |
| 1939 | 458 |
| 1940 | 404 |
| 1941 | 373 |
| 1942 | 367 |
| 1943 | 411 |
| 1944 | 368 |
| 1945 | 276 |
| 1946 | 287 |
| 1947 | 308 |
| 1948 | 244 |
| 1949 | 259 |
| 1950 | 214 |
| 1951 | 253 |
| 1952 | 158 |
| 1953 | 178 |
| 1954 | 175 |
| 1955 | 156 |
| 1956 | 168 |
| 1957 | 142 |
| 1958 | 131 |
| 1959 | 104 |
| 1960 | 97 |
| 1961 | 96 |
| 1962 | 24 |
| 1963 | 38 |
| 1964 | 35 |
| 1965 | 41 |
| 1966 | 5 |
| 1967 | 17 |
| 1968 | 18 |
| 1969 | 13 |
| 1971 | 11 |
| 1976 | 5 |
| 1978 | 10 |
| 1980 | 5 |
| 1982 | 5 |