There are married Roman Catholic priests...that is: clergymen who declare loyalty and obedience to the Holy Father in Rome....in the United States and,I suspect,other countries as well.My understanding is that most of these priests are Episcopal/Anglican priests who converted to Roman Catholicism,made the required professions of obedience to the Pontiff and were accepted into the priesthood by Rome's duly appointed representatives.
If *some* Roman Catholic priests are allowed to be married I can't understand why all are not given that option.