Answer:
The Italian mafia is where ever you have a cluster of Italians or Italy its self (mostly the island of Sicily) that are orchestrating crimes on a organized ladder such as Dons, Under-bosses, Capos, Soldiers, and a sh*t load of small time associates. There is a reported 26 major cities in America plus a nationwide lower ration of Mafia related activity. Other "Mafias" are in every country and do their own organized crime.