The tables below give the population of the city of St. Louis, St. Louis County, and the state of Missouri every ten years from 1820-2010. The population figures are from the U.S. Federal Census.|
St. Louis City and County separated from each other on 22 August 1876.
University of Virginia, Geospatial and Statistical Data Center: Historical Census Browser
U.S. Bureau of the Census: Missouri Population of Counties by Decennial Census: 1900 to 1990
U.S. Bureau of the Census: The Most Populous Counties and Incorporated Places in 2010 in Missouri: 2000 and 2010