St. Charles County Map
The County of St. Charles is located in the State of Missouri. Find directions to St. Charles County, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. According to the 2020 US Census the St. Charles County population is estimated at 406,204 people. The St. Charles County time zone is Central Daylight Time which is 6 hours behind Coordinated Universal Time (UTC).
Nearby counties include Calhoun County, Jersey County, Madison County, Franklin County, Lincoln County, St. Louis County, Warren County.
Top cities include O'Fallon, St. Charles, St. Peters, Florissant, Wentzville