COUNTY
St. Clair County
Michigan · 160,486 residents (2025 est.) · 721 sq mi
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The short version
With 160,221 people, St. Clair County is a county in Michigan. Few US counties rank higher on income. Four-year degrees are less common here than nationally, at 20% of adults. 81% of homes are owner-occupied. The median age is 44.5, about 6 years above the US median. The foreign-born share is 2%.
At a glance
Lower income
median household income $71,270, below the US median
US median: $82,259
Older
median age 44.5
US median: 38.9
Less educated
20% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about St. Clair County
What changed most since 1990
- White share95.6% → 89.7% (−6.0 pts)US over the same years: −17.8 pts
- Median age32.9 → 44.5 (+11.6 years)US over the same years: +6.0 years
- Adults with a bachelor's degree10.7% → 20.3% (+9.7 pts)US over the same years: +15.3 pts
Among the 83 counties in Michigan
- 22nd in household income$71,270
- 55th in share with a bachelor's degree20.3%
- 19th in home value$224,600
- 45th in diversity score24.1
Section 01
Population & growth
160,221
−2%since 2000
from 164,235 in 2000
160,486 in 2025 (Census Bureau estimate)
1990 – 2025
Land area
721 sq mi
Population, 1990 – 2024
2024160K
Age distribution, 2024
Under 54.8%(7,752)
5 to 95.3%(8,509)
10 to 146.1%(9,833)
15 to 196.1%(9,801)
20 to 245.4%(8,686)
25 to 3411.4%(18,327)
35 to 4411.4%(18,214)
45 to 5413.1%(21,009)
55 to 6415.9%(25,441)
65 to 7412.5%(20,031)
75 to 845.6%(8,989)
85 and over2.3%(3,629)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$71,270
−16%inflation adjusted, since 2000
from $46,313 in 2000
US average: $82,259
1990 – 2024
Households earning $100K+
47.3%
+17.8 ptssince 2009
from 29.5% in 2009
US average: 53.3%
Workforce by industry, 2024
Retail trade20.2%
Information11.9%
Wholesale trade8%
Finance & insurance5.8%
Professional, scientific, technical4.3%
Other services3.5%
Public administration2.6%
Education & health services1.5%
Transportation & warehousing1.4%
Agriculture, forestry, fishing1.3%
Arts, entertainment, food1.1%
Construction1%
Manufacturing0.3%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03
Housing
$224,600
Unchangedinflation adjusted, since 2000
from $122,700 in 2000
US average: $376,019
1990 – 2024
3.2
+2%since 2009
from 3.1 in 2009
1990 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
31
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity
2000
White, non-Hispanic93.7%(153,893)
Black2.1%(3,381)
Hispanic / Latino2.2%(3,593)
Asian0.4%(637)
Other0%
2024
White, non-Hispanic89.7%(143,658)
Black2.1%(3,395)
Hispanic / Latino3.7%(5,905)
Asian0.5%(785)
Other4%(6,478)
24
+39%since 2009
from 17 in 2009
1990 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
26
−34%since 2020
from 40 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins
Detailed origins & ancestry
Hispanic origin
Mexican2.7%(4,333)
Puerto Rican0.3%(459)
Cuban0.2%(288)
Spaniard0.1%(190)
Central American0.1%(155)
South American0%(75)
Nicaraguan0%(70)
Guatemalan0%(54)
Dominican0%(38)
Ecuadorian0%(36)
Honduran0%(18)
Venezuelan0%(15)
+ 2 more hispanic origin groups with data
Panamanian0%(13)
Colombian0%(11)
Asian origin
Filipino0.2%(350)
Pakistani0.1%(172)
Chinese0.1%(131)
Korean0.1%(87)
Asian Indian0%(38)
Burmese0%(36)
Vietnamese0%(22)
Uzbek0%(13)
Japanese0%(9)
Pacific Islander origin
Native Hawaiian0%(32)
Ancestry
German25.6%(40,997)
Irish12.9%(20,608)
Polish11.4%(18,312)
English11.1%(17,855)
Italian6.3%(10,121)
French4.6%(7,434)
American4.3%(6,956)
Scottish3.1%(5,036)
French Canadian2.6%(4,240)
Dutch1.5%(2,423)
Belgian1.3%(2,056)
Swedish1%(1,577)
+ 39 more ancestry groups with data
Hungarian0.8%(1,313)
Scotch-Irish0.8%(1,292)
Canadian0.6%(1,033)
Arab0.6%(981)
Norwegian0.6%(944)
Finnish0.5%(867)
Russian0.5%(838)
Greek0.5%(732)
Slovak0.4%(619)
Ukrainian0.3%(530)
Czech0.3%(494)
Welsh0.3%(486)
Romanian0.3%(417)
Lebanese0.3%(405)
Subsaharan African0.2%(395)
British0.2%(364)
Austrian0.2%(352)
Macedonian0.2%(254)
Armenian0.1%(235)
Iraqi0.1%(222)
Swiss0.1%(200)
Croatian0.1%(197)
West Indian0.1%(187)
Jamaican0.1%(187)
Danish0.1%(176)
Nigerian0.1%(173)
Lithuanian0.1%(167)
Egyptian0.1%(125)
Syrian0.1%(104)
Australian0.1%(94)
Serbian0%(70)
Portuguese0%(57)
Bulgarian0%(31)
Latvian0%(25)
Slovene0%(19)
Ghanaian0%(18)
Brazilian0%(15)
Turkish0%(12)
Moroccan0%(8)
Section 05
Education
High school or higher
92.0%
+9.2 ptssince 2000
from 82.8% in 2000
US average: 89.6%
Section 06
Commute & transportation
Section 07
Work & employment
Women 20-64 in the labor force
72.4%
+2.1 ptssince 2020
from 70.3% in 2020
US average: 74.6%
Section 08
People & community
Computer in household
94.9%
+4.2 ptssince 2020
from 90.7% in 2020
US average: 95.5%
Marital status
Men 15+
Never married31.4%(20,959)
Married53.5%(35,746)
Widowed3.1%(2,050)
Divorced12.1%(8,088)
Women 15+
Never married24.8%(16,701)
Married52.9%(35,584)
Widowed9.7%(6,538)
Divorced12.6%(8,461)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage
Direct-purchase
14.0%
+0.2 ptssince 2020
from 13.8% in 2020
US average: 13.8%
VA health care
2.3%
−0.5 ptssince 2020
from 2.8% in 2020
US average: 2.2%
Any private
71.3%
Unchangedsince 2020
from 71.3% in 2020
US average: 67.1%
Any public
42.1%
+0.2 ptssince 2020
from 41.9% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)14.7%(1,323)
Gulf War (1990s)17.6%(1,583)
Vietnam era38.7%(3,485)
Korean War5.2%(466)
World War II2%(182)
Share of the 9,016 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
St. Clair County, decade by decade
| Year | Population | Median household income | Median home value | Bachelor's degree+ | Diversity score |
|---|---|---|---|---|---|
| 1990 | 145,607 | $73,663 | $142,084 | 10.7% | 10.6 |
| 2000 | 164,235 | $84,366 | $223,517 | 12.6% | 15.1 |
| 2010 | 163,040 | $70,663 | $216,217 | 15.0% | 18.7 |
| 2020 | 160,383 | $71,173 | $196,714 | 19.1% | 26.1 |
| 2024 | 160,221 | $71,270 | $224,600 | 20.3% | 24.1 |
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
Drill deeper
Places similar to St. Clair County
Kings County
Pop 154,327
Mesa County
Pop 162,845
Johnson County
Pop 160,044
Indian River County
Pop 172,799
Places similar to St. Clair CountyHead to head
Compare St. Clair County to nearby counties
ST. CLAIR COUNTY VS
Macomb County
Income$77,837+9%
Home value$243,900+9%
Population886,221+452%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
Lapeer County
Income$77,306+8%
Home value$239,000+6%
Population89,516−44%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
Sanilac County
Income$58,863−17%
Home value$168,300−25%
Population40,083−75%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
Oakland County
Income$97,760+37%
Home value$343,600+53%
Population1,288,337+703%
SEE FULL COMPARISON →
Frequently asked
How many people live in St. Clair County, Michigan?
St. Clair County, Michigan has about 160,221 residents according to the 2024 American Community Survey.
What is the median household income in St. Clair County, Michigan?
The typical household in St. Clair County, Michigan earns about $71,270 a year. Half of households make more than that, and half make less.
Is St. Clair County, Michigan expensive?
In St. Clair County, Michigan, the median home is worth about $224,600, and the typical rent is about $1,029 a month.
How educated are people in St. Clair County, Michigan?
About 20.3% of adults age 25 and over in St. Clair County, Michigan hold a bachelor's degree or higher.
What is the poverty rate in St. Clair County, Michigan?
About 11.3% of people in St. Clair County, Michigan live below the federal poverty line.
Has St. Clair County, Michigan grown since 1990?
Yes, St. Clair County, Michigan has grown since 1990. The population has added about 14,614 residents, a change of about 10 percent over that period.
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All counties in MichiganDATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024