The Mongols Motorcycle Club, shortened to "Mongols MC" is a "one-percenter" motorcycle gang. It is headquartered in southern California and was originally formed in Montebello, California in 1969. Law enforcement officials estimate there are approximately 500 to 600 full patched (official) members. It has its main presence in southern California. It also claims it has chapters in US states of Nevada, Oklahoma, Colorado, Arizona, Montana, Oregon, New York, Indiana, Florida and Virginia, and in the countries of Canada, Italy and Mexico.