The best areas of the country for women's representation in elected office are the Pacific and New England regions, while the South and Middle Atlantic continue to fall behind.
Part of this discrepancy may have to do with how likely these regions are to vote Democratic. Fifteen of the 17 states with Gender Parity Scores of C or above either voted for Hillary Clinton in the 2016 Presidential election or currently have two Democratic senators, a fact that reinforces the extent to which Republican women are underrepresented in our government.
According to our Gender Parity Index Report for 2017, there is a correlation between women's representation and geographic location. Eleven of the 17 states with Gender Parity Grades of C or above border an ocean, and ten of these states are part of the Pacific or New England regions.
However, not all coastal states performed well. The four states which received F grades (Georgia, Louisiana, Mississippi, and Pennsylvania) are all coastal states. None of these states are in top performing geographic regions, and all of them voted Republican in the 2016 Presidential election.
Women's representation is not entirely dependent on geography or partisanship, but these two factors - which are highly correlated with each other - both play an important role.