Data Science Renee has a twitter list of approximately 632 women in data science.
I say “approximately” because when I first saw her post about the list it had 630 members. When I looked this AM, it had 632 members. By the time you look, that number will be different again.
If you are making a conscious effort to seek a diversity of speakers for your next data science conference, it should be on your list of sources.
Enjoy!