St. Charles County is located in eastern Missouri and is part of the St. Louis metropolitan area. It is the third most populous county in Missouri, with an estimated population of 393,726 in 2019. The county seat is St. Charles. The county was established in 1812.

The county is governed by a three-member County Commission, which is elected in staggered four-year terms. The county also has a County Executive, who is elected in a countywide election.

The county is home to several universities, including Lindenwood University, St. Charles Community College, and the University of Missouri-St. Louis.

St. Charles County is served by several major highways, including Interstate 70, Interstate 64, and Interstate 270. The county is also served by the St. Louis Lambert International Airport.

The county is home to several parks and recreational areas, including the Katy Trail State Park, the St. Charles County Parks and Recreation Department, and the St. Charles County Historical Society. The county also has several museums, including the St. Charles County Historical Museum and the Foundry Art Centre.

For the most up-to-date and in-depth information, please check the public records links below.