St. Clair, MI

City in St. Clair County, MI, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

5,585

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

years ∙ half population younger than 42, half older

Diversity Index

15%

chance two random people differ in race and ethnicity

Nativity

1.7%

foreign-born population

98.3%Native

1.7% Foreign-born

Geographic Context

Location, size, and surroundings

About

St. Clair is a city within St. Clair County, Michigan, United States.

Location

City in St. Clair County, MI, US

Co-ordinates

DEC42.826530° N, 82.492433° W

DMS42° 49′ 35.51″ N, 82° 29′ 32.76″ W

Population Density & area

1,900/sq mi (733.9/km²)

Total Area

3.62 sq mi (9.36 km²)

Land Area

2.94 sq mi (7.61 km²) · 81.3%

Water Area

0.68 sq mi (1.75 km²) · 18.7%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

44.2% male

Male 44.2%

Female 55.8%

males per 100 females

St. Clair 79.1

St. Clair County 100.3

Michigan 98.2

Nativity

1.7%

foreign-born population

98.3%Native

1.7% Foreign-born

% Foreign-born

St. Clair 1.7%

St. Clair County 2%

Michigan 7.2%

Age Distribution

How the population is spread across age groups

Median Age

years ∙ half population younger than 42, half older

St. Clair

St. Clair County

44.5

Michigan

40.2

Dependency ratio

78.1

dependents per 100 working-age adults

St. Clair 78.1

St. Clair County 68.5

Michigan 66.3

AGE DISTRIBUTION

Distribution of age group

Median age

	St. Clair	St. Clair County	Michigan
Age Group
Children (Under 18)	23.7%	20.3%	21.2%
Working age (18-64)	56.1%	59.3%	60.2%
Senior (65+)	20.2%	20.4%	18.6%
Dependency ratio
Total dependency ratio	78.1	68.5	66.3
Child dependency ratio	42.2	34.2	35.3
Old-age dependency ratio	35.9	34.3	31

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

92.1%

Black

3.7%

Asian

Hispanic

1.7%

Other

2.5%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

15%

chance two random people differ in race and ethnicity

St. Clair 15%

St. Clair County 19.2%

Michigan 45.2%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of St. Clair population

	St. Clair	St. Clair County	Michigan
Hispanic or Latino	1.7%	3.7%	5.9%
Mexican	0.3%	2.7%	4%
Puerto Rican	0.5%	0.3%	0.5%
Cuban	0%	0.2%	0.2%
Other Hispanic / Latino	0.9%	0.5%	1.2%
Not Hispanic or Latino	98.3%	96.3%	94.1%
One race	95.9%	92.7%	89.6%
White	92.1%	89.7%	72.4%
Black or African American	3.7%	2.1%	13.1%
American Indian and Alaska Native	0%	0.1%	0.3%
Asian	0%	0.5%	3.4%
Native Hawaiian and Other Pacific Islander	0%	0%	0%
Some Other Race	0%	0.3%	0.5%
Two or more races (Multiracial)	2.4%	3.6%	4.5%

Household & Families Composition

Household size, type, and family structure

Household structure

62.2% family

Family 62.2%

Non family 37.8%

% family households

St. Clair 62.2%

St. Clair County 65.7%

Michigan 62.4%

Average household size

2.32

persons per household

St. Clair

2.32

St. Clair County

2.34

Michigan

2.42

Household & Family COMPOSITION

Households

Percentage of St. Clair population

	St. Clair	St. Clair County	Michigan
Total households	2,404	67,816	4,076,369
Average houshold size	2.32	2.34	2.42
Family households	1,496	44,528	2,545,621
Average family size	2.95	2.85	3.05
Married couple family	1,046	33,779	1,878,767
Other families	450	10,749	666,854
Male householder	21	3,473	199,150
Female householder	429	7,276	467,704
Non-family households	908	23,288	1,530,748
One-person households	743	19,112	1,250,418
Male householder	326	9,419	583,425
Senior (65+) living alone	40	3,685	188,594
Female householder	417	9,693	666,993
Senior (65+) living alone	317	5,463	349,637
Other living arrangements	165	4,176	280,330

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

2,404

housing units

St. Clair 2,404

St. Clair County 72,799

Michigan 4,622,236

Occupancy status

100% occupied

Occupied 100%

Vacant 0%

vacancy rate

St. Clair 0%

St. Clair County 6.8%

Michigan 11.8%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

83.5%

Single family houses

83.5%

Apartments in multi-unit structures

16.5%

Mobile homes

Boat, RV, van, etc

Median Year Built

1959

Half of houses were built before 1959, and half after.

Historic ∙ 1939 or earlier

25%

Postwar & mid-century ∙ 1940 - 1969

35.2%

Late 20th century ∙ 1970 - 1999

28.5%

Modern ∙ 2000 or later

11.3%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	St. Clair	St. Clair County	Michigan
Rooms per unit
Median rooms	6.3	6	5.9
1–3 rooms	6.2%	7.1%	10.5%
4–6 rooms	47.8%	51.9%	51.9%
7+ rooms	46%	41%	37.6%
Bedrooms
No bedroom / studio	0%	1.3%	1.6%
1 bedroom	7.7%	6.2%	8.9%
2 bedrooms	30%	21.2%	24.6%
3 bedrooms	41.8%	50.2%	43.5%
4+ bedrooms	20.6%	21.1%	21.4%
At a glance
Median year built	1959	1975	1972
Total housing units	2,404	72,799	4,622,236

Occupancy Profile

Who is inside and how they use it

Homeownership

68.1% owners

Renter-occupied 31.9%

Owner-occupied 68.1%

homeownership rate

St. Clair 68.1%

St. Clair County 80.8%

Michigan 73.2%

Average household size

2.53

Owner-occupied

1.85

Renter-occupied

owner-occupied average size

St. Clair 2.53

St. Clair County 2.41

Michigan 2.54

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	St. Clair	St. Clair County	Michigan
Total occupied units	2,404	67,816	4,076,369
Year moved in
2020 or later	23.8%	19%	21%
2010 to 2019	36.5%	37.7%	39.5%
2000 to 2009	16%	17.1%	16%
1999 or earlier	23.7%	26.2%	23.4%
Occupants per room
1.00 or fewer	99.4%	98.9%	98.4%
1.01 to 1.50	0.6%	0.8%	1.2%
1.51 or more	0%	0.3%	0.4%
Vehicles availability
No vehicles	4.7%	5.9%	7%
1 vehicle	38.6%	30.4%	34.8%
2 vehicles	38.7%	38.7%	38.3%
3 or more vehicles	18%	25%	19.8%
House heating fuel used
Gas	84.2%	85.9%	83.6%
Electricity	12.4%	9%	12.1%
Solar	0%	0.1%	0%
Fuel oil, kerosene etc	0%	0.9%	0.8%
All other fuels	3.4%	3.5%	3%
No fuel used	0%	0.7%	0.5%
Selected characteristics
Lacking complete plumbing	0%	0.5%	0.4%
Lacking complete kitchen	0%	0.7%	0.7%
No telephone service available	0%	0.9%	0.7%

Housing Value

What owner-occupied units are worth

Median home value

$223,200

owner-occupied units

Median value(USD)

St. Clair

$223,200

St. Clair County

$224,600

Michigan

$231,600

Housing Cost Burden

25.1%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

25.1%

Owners without a mortgage

13.4%

Renters

39%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	St. Clair	St. Clair County	Michigan
Property value
Median Value	$223,200	$224,600	$231,600
Under $100,000	11.8%	13.6%	16.8%
$100,000 - $200,000	33.5%	28.9%	24.7%
$200,000 - $300,000	27.4%	26.2%	23.4%
$300,000 - $500,000	21.7%	24.7%	24.1%
$500,000 - $1,000,000	5.6%	5.8%	9.2%
$1,000,000 and more	0%	0.7%	1.6%
Owner-occupied households
With a mortgage	54.5%	57.3%	57.8%
Without a mortgage	45.5%	42.7%	42.2%
Median monthly owner costs
With a mortgage	$1,468	$1,469	$1,569
Without a mortgage	$626	$600	$602
Gross rent
Median rent	$1,113	$1,029	$1,129

Education Profile

How educated is the community and how education pays off

Adults with a college degree

27.4%

of adults 25+ with a bachelor's degree or higher

St. Clair 27.4%

St. Clair County 20.3%

Michigan 32.4%

Adults without a high school diploma

5.2%

of adults (25+) without a high school diploma

St. Clair 5.2%

St. Clair County 7.9%

Michigan 8%

School Enrollment

Who is enrolled in school and at what level

School enrollment

1,505

population (age 3+) enrolled in school

Nursery / Preschool

K–12

83.1%

College / Undergraduate

8.7%

Graduate / Professional

7.2%

College-going rate (18-24 yr olds)

22.7%

of 18-24-year-olds in college or graduate school

St. Clair

22.7%

St. Clair County

22.9%

Michigan

41.1%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	St. Clair	St. Clair County	Michigan
Total enrolled (age 3+)	1,505	31,184	2,312,914
Nursery / preschool	1%	5.9%	5.6%
K–12	83.1%	77.6%	67.9%
Kindergarten	4.3%	5.1%	5.2%
Elementary: Grades 1–4	28.6%	21.6%	19.7%
Elementary: Grades 5–8	30.1%	25.1%	20.8%
High School: Grades 9–12	20.1%	25.8%	22.2%
College or graduate school	15.9%	16.5%	26.5%
College, undergraduate	8.7%	14.7%	21.1%
Graduate, professional school	7.2%	1.8%	5.4%
College-going rate · 18-24 yr olds	22.7%	22.9%	41.1%
School type
Public school	87.7%	86.3%	85.2%
Private school	12.3%	13.7%	14.8%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

3,840

population 25 years and over

Total adults (25+)

Less than 9th grade

1.6%

9th-12th, no diploma

3.6%

HS graduate

30.7%

Some college no degree

23.9%

Associates degree

12.9%

Bachelors degree

20.4%

Graduate or professional degree

6.9%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

82.5% · 17.5%

9th-12th, no diploma

49.3% · 50.7%

HS graduate

45.2% · 54.8%

Some college no degree

41.2% · 58.8%

Associates degree

43.9% · 56.1%

Bachelors degree

37.6% · 62.4%

Graduate or professional degree

36.8% · 63.2%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	St. Clair	St. Clair County	Michigan
Population (25+)	3,840	115,640	7,008,507
Less than 9th grade	1.6%	1.9%	2.6%
9th–12th, no diploma	3.6%	6%	5.4%
High school diploma or GED	30.7%	33%	28%
Some college, no degree	23.9%	26%	21.9%
Associate's degree	12.9%	12.7%	9.8%
Bachelor's degree or higher	27.4%	20.3%	32.4%
Bachelor's degree	20.4%	12.8%	19.7%
Graduate or professional	6.9%	7.5%	12.7%
High School or higher	94.8%	92%	92.1%

Earnings by education level

percentage as applicable

Median Earnings

$50,747

Median earnings for adults 25+, by level

Less than HS graduate

$—

HS graduate

$36,970

Some college or associates

$52,112

Bachelors degree

$43,781

Graduate or professional degree

$82,438

Poverty Rate

3.6%

for ages 25+, with bachelors degree or higher

Less than HS graduate

4.5%

HS graduate

15.5%

Some college or associates

3.8%

Bachelors degree or higher

3.6%

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	St. Clair	St. Clair County	Michigan
Median earnings
Population 25+, with earnings	$50,747	$47,476	$50,316
Less than high school graduate	$—	$30,677	$31,851
High school graduate (includes equivalency)	$36,970	$39,059	$37,777
Some college or associate's degree	$52,112	$47,458	$44,844
Bachelor's degree	$43,781	$62,466	$66,893
Graduate or professional degree	$82,438	$73,851	$85,195
Poverty rates
Less than high school graduate	4.5%	20.7%	27.4%
High school graduate (includes equivalency)	15.5%	12.7%	15.2%
Some college or associate's degree	3.8%	8.6%	10.3%
Bachelor's degree or higher	3.6%	3.1%	4.2%

Insights for St. Clair, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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