The rank of Captain is generally held by the commanding officer of a starship. Captains may also serve as starbase commanders, the heads of experimental engineering teams, and head divisions of support personnel.
All known (canon) women captains in Starfleet.
Thanks to many contributors at Memory Alpha for the information, and TrekCore for the screencaps.
We’ve been here all of four minutes and you guys have already forgotten everything I said! Party huddle, stat!
(Source: bodiebroadus, via undercoveroperation)