Mirtha is a rare girls' name that was most common in the 1970s and has all but disappeared.
Mirtha is a girl name. It last appears in U.S. records in 2008. Mirtha was first reported in SSA data in 1948 and peaked in 1972 (21 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2008 | 5 | 5 | #19,539 |
| 2005 | 6 | 6 | #15,816 |
| 2004 | 7 | 7 | #13,740 |
| 2003 | 7 | 7 | #13,396 |
| 2002 | 10 | 10 | #10,014 |
| 2001 | 14 | 14 | #7,610 |
| 2000 | 6 | 6 | #14,421 |
| 1999 | 5 | 5 | #16,061 |
| 1998 | 11 | 11 | #8,387 |
| 1997 | 7 | — | #11,677 |
| 1996 | 11 | — | #7,942 |
| 1995 | 11 | — | #7,893 |
| 1994 | 11 | — | #7,972 |
| 1993 | 9 | — | #9,254 |
| 1992 | 12 | — | #7,365 |
| 1991 | 11 | — | #7,782 |
| 1990 | 18 | — | #5,209 |
| 1989 | 10 | — | #7,843 |
| 1988 | 9 | — | #8,157 |
| 1987 | 12 | — | #6,196 |
| 1986 | 13 | — | #5,659 |
| 1985 | 11 | — | #6,314 |
| 1984 | 5 | — | #11,555 |
| 1983 | 16 | — | #4,613 |
| 1982 | 16 | — | #4,652 |
| 1981 | 13 | — | #5,479 |
| 1980 | 11 | — | #6,185 |
| 1979 | 11 | — | #6,022 |
| 1978 | 7 | — | #8,227 |
| 1977 | 7 | — | #8,102 |
| 1976 | 9 | — | #6,403 |
| 1975 | 15 | — | #4,289 |
| 1974 | 13 | — | #4,627 |
| 1973 | 17 | — | #3,744 |
| 1972 | 21 | — | #3,135 |
| 1971 | 16 | — | #3,891 |
| 1970 | 13 | — | #4,412 |
| 1969 | 16 | — | #3,560 |
| 1968 | 11 | — | #4,404 |
| 1967 | 9 | — | #4,858 |
| 1966 | 11 | — | #4,126 |
| 1965 | 6 | — | #6,282 |
| 1964 | 11 | — | #4,270 |
| 1963 | 15 | — | #3,427 |
| 1962 | 15 | — | #3,388 |
| 1961 | 9 | — | #4,786 |
| 1960 | 5 | — | #7,014 |
| 1959 | 8 | — | #4,906 |
| 1958 | 5 | — | #6,723 |
| 1955 | 7 | — | #5,048 |
| 1948 | 5 | — | #5,780 |