County Dossier

St. Clair County

Michigan | County

Population

160,221

Land Area

721.5 sq mi

Context

Metro

Geography

County silhouette

Land Area
721.5 sq mi
Water Area
115.0 sq mi
Water Share
13.7%

Terrain Layer

Open the county terrain view inside the atlas flow.

Terra Firma

Population & Housing

Population

160,221

Density
222.1 / sq mi
Households
67,816
Housing Units
72,799
Median Age
44.5 years

Income & Economy

Median Household Income

$71,270

GDP

$7.42B

Real GDP Change+0.6%
Per Capita Income
$38,214
Personal Income
$9.29B
Personal Income Per Capita
$57,943

Classification

RUCC 1
Metro

Counties in metro areas of 1 million population or more

Provenance

GEOID 26147 ANSI 01625033
Latitude 42.92880 Longitude -82.66891
Canonical 2025 Gazetteer ACS ACS 2020-2024 5-year BEA BEA county 2024 release (2026-02-05) BLS BLS LAUS 2024 annual average USDA USDA RUCC 2023 USGS USGS 3DEP published as of 2026-03-23