The baby name Mirtha appears in baby name data for the United States from 1970 to 1990. It was most popular in 1990 with 20 babies given the name.
Over the period shown, Mirtha has stayed at a similar level of popularity.
| Year | Count |
|---|---|
| 1970 | 6 |
| 1971 | 6 |
| 1973 | 7 |
| 1974 | 5 |
| 1981 | 5 |
| 1983 | 5 |
| 1990 | 20 |