St Clair County Flag

St Clair County

State:
Michigan
County Seat:
Port Huron

St. Clair County's estimated 2025 population is 160,286 with a growth rate of 0.13% in the past year according to the most recent United States census data. St. Clair County is the 13th largest county in Michigan. The 2010 population was 162,688 and has seen a growth of -1.48% since that time.

160,286
Total Population
222
Population Density (miĀ²)
13
Population Rank (State)
206 0.13%
Annual Population Growth

St. Clair County Population

St. Clair County Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of St. Clair County includes 91.56% White, and smaller percentages for Black or African American, other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Race
Population
Percentage (of total)
White146,57191.56%
Two or more races6,9004.31%
Black or African American3,7132.32%
Other race1,8041.13%
Asian8460.53%
Native American2480.15%
Native Hawaiian or Pacific Islander70%

St. Clair County Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. Clair County's average per capita income is $46,163. Household income levels show a median of $69,349. The poverty rate stands at 10.99%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$97,567$116,886
Families$85,166$104,301
Households$69,349$88,904
Non Families$39,771$52,887

$46,163

Average Income

$69,349

Median Household Income

10.99%

Poverty Rate