O Fallon, MO

ZIP code 63366 covers a large part of O’Fallon, in St. Charles County, Missouri, within the St. Louis metropolitan area. It is primarily suburban, with residential neighborhoods, shopping areas, and community parks. Notable landmarks include Fort Zumwalt Park, home to the historic Zumwalt’s Fort log cabin; the Ozzie Smith Sports Complex; O’Fallon Municipal Centre; and Civic Park, which includes Alligator’s Creek Aquatic Center.