Mirta is a female given name which may refer to: Mirta Aguirre (1912-1980), Cuban poet, novelist, journalist and political activist; Mirta Busnelli (born 1946), Argentine actress; Mirta Diaz-Balart (born 1928), first wife of Fidel Castro; Mirta Miller (born 1948), Argentine actress; Mirta Ojito (born 1964), Cuban-American newspaper reporter