Only 6 out of 50 U.S. states have women governors, 12 women serve as lieutenant governors, and 57 women hold other statewide offices such as attorney general or secretary of state.
Number of women serving: 75 out of 312
Percentage of women: 24%
# of Republicans: 42
# of Democrats: 32
First woman elected in her own right: Ella Grasso (CT) in 1975
Fact sheet on women in statewide elective office from the Center for American Women in Politics, Rutgers University.