
There are some interesting patterns here. The West and New England jump out as having the highest rates of elected women. Of course, Wyoming was the first state to grant women the right to vote, followed by the other early-adopting states of Utah, Idaho, and Colorado, so the West has a long tradition of being at the forefront of women's participation in democratic government. Meanwhile, as a result of the 2008 elections, the New Hampshire State Senate is the first statewide legislative body in the US to have a female majority - 13 of its 24 members are women. At the other end of the spectrum, the South has generally low numbers of women in state legislators, and South Carolina has the lowest of all - the only state where fewer than 10% of representatives are women.
Globally, only 17% of parliamentary members are women - an improvement on the 10% registered in 1995, but obviously still far short of the 51% of the world's population who are women. Countries with the greatest equality in representative government include Sweden (46% women) and Spain (41%). Turkey, by contrast, has only one female representative, and Romania has none at all.
Here'a a world map showing women in government as a proportion of elected officials:

There aren't any countries where women form a majority of a governing body; in only 22 countries do they constitute even a quarter of all representatives. And, as in the case of so many social indicators, Scandinavia leads the way (though in this case, interestingly, so does southern Africa).