Dortha is an uncommon variant of Dorothy that was most common in the 1920s and has all but disappeared.
Dortha is a girl name. It last appears in U.S. records in 1984. Dortha was first reported in SSA data in 1889 and peaked in 1921 (295 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1984 | 5 | — | #10,864 |
| 1983 | 5 | — | #10,731 |
| 1982 | 5 | — | #10,939 |
| 1980 | 7 | — | #8,387 |
| 1978 | 5 | — | #10,182 |
| 1976 | 6 | — | #8,428 |
| 1975 | 5 | — | #9,463 |
| 1973 | 5 | — | #8,783 |
| 1972 | 9 | — | #5,598 |
| 1970 | 5 | — | #8,332 |
| 1969 | 9 | — | #5,154 |
| 1968 | 5 | — | #7,301 |
| 1967 | 11 | — | #4,110 |
| 1966 | 9 | — | #4,589 |
| 1965 | 8 | — | #4,951 |
| 1964 | 19 | — | #2,932 |
| 1963 | 14 | — | #3,502 |
| 1962 | 22 | — | #2,622 |
| 1961 | 30 | — | #2,162 |
| 1960 | 22 | — | #2,589 |
| 1959 | 24 | — | #2,355 |
| 1958 | 26 | — | #2,224 |
| 1957 | 28 | — | #2,080 |
| 1956 | 23 | — | #2,336 |
| 1955 | 37 | — | #1,705 |
| 1954 | 33 | — | #1,804 |
| 1953 | 41 | — | #1,534 |
| 1952 | 34 | — | #1,689 |
| 1951 | 34 | — | #1,644 |
| 1950 | 45 | — | #1,368 |
| 1949 | 47 | — | #1,341 |
| 1948 | 44 | — | #1,390 |
| 1947 | 67 | — | #1,089 |
| 1946 | 58 | — | #1,116 |
| 1945 | 69 | — | #905 |
| 1944 | 69 | — | #928 |
| 1943 | 87 | — | #833 |
| 1942 | 71 | — | #928 |
| 1941 | 85 | — | #783 |
| 1940 | 85 | — | #753 |
| 1939 | 110 | — | #650 |
| 1938 | 103 | — | #678 |
| 1937 | 120 | — | #616 |
| 1936 | 130 | — | #579 |
| 1935 | 139 | — | #546 |
| 1934 | 154 | — | #522 |
| 1933 | 151 | — | #518 |
| 1932 | 165 | — | #507 |
| 1931 | 181 | — | #475 |
| 1930 | 203 | — | #472 |
| 1929 | 212 | — | #452 |
| 1928 | 177 | — | #520 |
| 1927 | 221 | — | #469 |
| 1926 | 264 | — | #420 |
| 1925 | 293 | — | #400 |
| 1924 | 276 | — | #419 |
| 1923 | 276 | — | #403 |
| 1922 | 238 | — | #433 |
| 1921 | 295 | — | #390 |
| 1920 | 248 | — | #425 |
| 1919 | 219 | — | #445 |
| 1918 | 186 | — | #496 |
| 1917 | 205 | — | #450 |
| 1916 | 157 | — | #525 |
| 1915 | 148 | — | #511 |
| 1914 | 105 | — | #547 |
| 1913 | 94 | — | #527 |
| 1912 | 97 | — | #486 |
| 1911 | 49 | — | #611 |
| 1910 | 37 | — | #699 |
| 1909 | 33 | — | #693 |
| 1908 | 42 | — | #576 |
| 1907 | 50 | — | #508 |
| 1906 | 29 | — | #679 |
| 1905 | 22 | — | #785 |
| 1904 | 32 | — | #602 |
| 1903 | 20 | — | #766 |
| 1902 | 20 | — | #777 |
| 1901 | 19 | — | #749 |
| 1900 | 15 | — | #983 |
| 1899 | 9 | — | #1,120 |
| 1898 | 5 | — | #1,770 |
| 1897 | 12 | — | #938 |
| 1896 | 5 | — | #1,643 |
| 1895 | 7 | — | #1,335 |
| 1894 | 9 | — | #1,080 |
| 1892 | 11 | — | #918 |
| 1889 | 5 | — | #1,332 |