St. Clair County, MI Map
Official Census boundary of St. Clair County, Michigan (FIPS 26147). Turn on flood zones, contours, land cover and school districts, measure distances, or click any spot to inspect it.
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St. Clair County Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
160,221
Households
67,816
Median household income
$71,270
Median age
44.5 years
Median home value
$224,600
Median gross rent
$1,029/mo
Owner-occupied homes
80.8%
Bachelor's degree or higher
20.3%
Below poverty level
11.3%
Land area
721.5 sq mi
Population density
222 / sq mi