There has never been a legitimate, female Pope. All seminarians, deacons, priests, Bishops, and Popes, in the Roman Catholic Christian Church, must be males. I hope this helps to fully answer your question. Frank
Pope Joan was a legendary female Pope who allegedly reigned for a few years some time during the Middle Ages. The story first appeared in 13th-century chronicles, and was subsequently spread and embellished throughout Europe. It was widely believed for centuries, though modern religious scholars consider it fictitious, perhaps deriving from historicised folklore regarding Roman monuments or from anti-papal satire. Read more here: http://en.wikipedia.org/wiki/Female_Pope
I have wondered if any women were clever enough to fool everyone into believing that she was a he. Wouldn't be that hard with the robes they all wear. I don't think we'll ever know the true answer to this question. The person who answered with no legitimate female popes.