St. Charles County, Missouri
county in Missouri, United States
St. Charles County is a county in Missouri, United States. The county seat is St. Charles. In 2020, 405,262 people lived there,[1] making it the third-most populous county in Missouri.
![](http://up.wiki.x.io/wikipedia/commons/thumb/6/6e/Map_of_Missouri_highlighting_St._Charles_County.svg/220px-Map_of_Missouri_highlighting_St._Charles_County.svg.png)
![](http://up.wiki.x.io/wikipedia/commons/thumb/3/30/Flag_of_St._Charles_County%2C_Missouri.gif/220px-Flag_of_St._Charles_County%2C_Missouri.gif)
St. Charles County is part of the St. Louis, MO-IL Metropolitan Statistical Area and has many of the city's northwestern suburbs.
References
change- ↑ "QuickFacts: St. Charles County, Missouri". United States Census Bureau. Retrieved August 11, 2023.