The best answer here is "maybe" there has been one female pope. Impossible to prove or disprove.
The tales about a Pope Joan are pure fiction. It never happened.
Catholic Answer
Exactly none, the Pope is always the Bishop of Rome (other than a short period in France) and only a male Catholic can be a Bishop.
There have been 13 popes named Innocent.
Throughout history, there have been a few instances of popes who were married, but the majority of popes have been celibate.
217 popes have been born in Italy.
There have been no popes named Jude.
There have been no popes named Kenneth.
As of April 2013 there have been 266 popes.
There have been 117 Popes of the Coptic See of Alexandria (Orthodox)
There have been 217 Italian popes and only 49 non-Italian popes.
There have been 6 popes named Sixtus.
There have been 13 popes named Leo.
There have been 8 popes called Urban.
There have been a total of 265 popes including Peter.