St. Louis County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 998,954, making it the most populous county in Missouri. Its county seat is Clayton.
Latitude: 38° 38' 24.00" N
Longitude: -90° 26' 24.00" W
Nearest city to this article: Frontenac, Missouri Read about St. Louis County, Missouri in the Wikipedia Satellite map of St. Louis County, Missouri in Google Maps