Anyone who has ever cracked open one of the “major” lit mags knows that women are by far the under-represented sex. If you want the exact numbers, refer to VIDA’s Count. They have charts!
Even with publications like Poetry striving for a fair mix, it can be hard to find markets if you’re female and writing today. What a shame!
Thank God for the rise in “women-centric” journals. While not a comprehensive resource, I have attempted to compile a list of such pubs below:
*denotes magazines narrowed further by ethnicity, age, etc.
If your publication has been left off OR you know of a journal that should have been included, please add via the comments section. Feedback is…great, terrific, awesome!
A Few Additions:
The Wardrobe
Room Magazine
Southern Women’s Review
Bone Bouquet
TRIVIA: Voices of Feminism
Wicked Alice
HOW2 Journal
Bonespark~ 
It’s not really intentional, but due to links to WOM-PO and various other groups, Antiphon http://www.antiphon.org.uk (online poetry mag) publishes lots of women! We’re always happy to receive submissions of great poetry.
Left off “Southern Women’s Review”. Guidelines here: http://southernwomensreview.com/index.php/editorial-guildelines
I would add TRIVIA: Voices of Feminism to this list.
http://www.triviavoices.com/current-issue.html#.Un3CRuKR3yA
Hey! I’m an editor for ROAR, and past editor for So to Speak. Thanks so much for supporting us on your site! You might also consider Women’s Institute for
Freedom of the Press at http://wifp.org/DWM/ContentsDWM.html. They have an extensive database of publishers supporting women in the creative arts. My site http://moonspitpoetry.com/ is also in effort of supporting women and feminist artists.
My spunky lit mag, Black Heart Magazine (http://blackheartmagazine.com), publishes lots of ladies. I haven’t done a formal count, since counting is a chore and a bore best left to dull white dudes called accountants, but we definitely always want more from all angles and areas of representation. Our only criteria for literature is that it kick ass.