St. Charles County, MO Map
Official Census boundary of St. Charles County, Missouri (FIPS 29183). Turn on flood zones, contours, land cover and school districts, measure distances, or click any spot to inspect it.
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St. Charles County Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
414,535
Households
161,311
Median household income
$104,692
Median age
39.8 years
Median home value
$320,800
Median gross rent
$1,370/mo
Owner-occupied homes
80.5%
Bachelor's degree or higher
42.7%
Below poverty level
5.2%
Land area
560.5 sq mi
Population density
740 / sq mi