St. Clair County, Michigan Population 2024

160,080

St. Clair County, Michigan's estimated 2024 population is 160,080 with a growth rate of 0.13% in the past year according to the most recent United States census data. St. Clair County, Michigan is the 13th largest county in Michigan. The 2010 population was 162,688 and has seen a growth of -1.6% since that time.

Note: data after 2022 is projected based on recent change

37 Rows

Year
Population
Growth
Change
2029161,1102060.13%
2028160,9042060.13%
2027160,6982060.13%
2026160,4922060.13%
2025160,2862060.13%
2024160,0802060.13%
2023159,8742060.13%
2022159,668-537-0.34%
2021160,205-175-0.11%
2020160,3801,0410.65%
2019159,3391530.1%
2018159,186560.04%
2017159,130-347-0.22%
2016159,477-280-0.18%
2015159,757-346-0.22%
2014160,103-209-0.13%
2013160,312-325-0.2%
2012160,637-949-0.59%
2011161,586-1,102-0.68%
2010162,68800%
1990145,6076,8054.9%
1980138,80218,62715.5%
1970120,17512,97412.1%
1960107,20115,60217.03%
195091,59915,37720.17%
194076,2228,65912.82%
193067,5639,55416.47%
192058,0095,66810.83%
191052,341-2,887-5.23%
190055,2283,1235.99%
189052,1055,90812.79%
188046,1979,53626.01%
187036,66110,05737.8%
186026,60416,184155.32%
185010,4205,814126.23%
18404,6063,492313.46%
18301,114-159,996-99.31%
2024 Growth Rate
0.13% (206)
County Website
St. Clair County
County Seat
Port Huron
2020 Population
160,380
Area
721 mi²
Density
222 people/mi²
Growth Since 2020
-0.19% (-300)
Founded
March 28, 1820

Population by Race

Race
Population
Percentage (of total)
White147,65592.14%
Two or more races6,5314.08%
Black or African American3,7532.34%
Other race1,2530.78%
Asian7590.47%
Native American2840.18%
Native Hawaiian or Pacific Islander220.01%

White

Two or more races

Black or African American

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

St. Clair County, Michigan Population by Race

St. Clair County, Michigan Population Pyramid 2024

St. Clair County, Michigan Median Age

44.1

Total

43

Male

45.2

Female

St. Clair County, Michigan Adults

There are 127,352 adults, (31,019 of whom are seniors) in St. Clair County, Michigan.

St. Clair County, Michigan Age Dependency

66.4

Age Dependency Ratio

32.2

Old Age Dependency Ratio

34.2

Child Dependency Ratio

St. Clair County, Michigan Sex Ratio

Female79,98449.91%
Male80,27350.09%

St. Clair County, Michigan Population by Age

St. Clair County, Michigan Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All65,9892.480.319.7
Married33,2952.96928
Non Family21,6491.2269.930.1
Female7,5463.0661.238.8
Male3,4993.0674.325.7

2.89

Average Family Size

2.4

Average Household Size

80.3%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

St. Clair County, Michigan Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade7,2306.31%
Associates Degree14,23012.42%
Bachelors Degree14,30012.48%
Graduate Degree8,5007.42%
High School Graduate38,26033.39%
Less Than 9th Grade2,0281.77%
Some College30,05226.22%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

St. Clair County, Michigan Educational Attainment by Sex (over 25)

St. Clair County, Michigan Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

Race
Total
High School
Bachelors
White106,05497,85721,327
2+ Races3,1622,833381
Hispanic3,1022,585710
Black2,3112,111250
Other Race829638225
Asian563522271
Native American23619113
Islander1188

The highest rate of high school graduation is among asian people with a rate of 92.72%.

The highest rate of bachelors degrees is among islander people with a rate of 72.73%.

St. Clair County, Michigan Educational Attainment by Race

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$61,119$77,998$48,236
Graduate Degree$75,591$96,006$66,338
High School Graduate$35,182$44,380$24,405
Less Than 9th Grade$27,322$39,697$17,267
Overall$44,673$56,508$33,584
Some College$44,542$60,431$32,833

$44,673

Average Earnings

$56,508

Average Male

$33,584

Average Female

St. Clair County, Michigan Earnings by Educational Attainment

St. Clair County, Michigan Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

St. Clair County, Michigan Language

97.6% of St. Clair County, Michigan residents speak only English, while 2.4% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1% of the population.

St. Clair County, Michigan Language

St. Clair County, Michigan Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White143,23715,61310.9%
Multiple6,4551,51823.52%
Black3,5931,00327.92%
Hispanic5,63987115.45%
Other1,1621089.29%
Native2846723.59%
Asian751131.73%

11.85%

Overall Poverty Rate

10.75%

Male Poverty Rate

12.95%

Female Poverty Rate

Poverty in St. Clair County, Michigan

The race most likely to be in poverty in St. Clair County, Michigan is Black, with 27.92% below the poverty level.

The race least likely to be in poverty in St. Clair County, Michigan is Asian, with 1.73% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.18%. Among those working part-time, it was 14.54%, and for those that did not work, the poverty rate was 16.45%.

St. Clair County, Michigan Poverty

rate

Rate
Poverty
Less Than 9th Grade22.65%
High School12.76%
Some College8.98%
Bachelors or Greater3.48%

St. Clair County, Michigan Poverty Rate by Education

rate

Rate
Poverty
Male Unemployed29.66%
Female Unemployed24.82%
Female Employed7.15%
Male Employed3.96%

St. Clair County, Michigan Poverty Rate by Employment Status and Sex

St. Clair County, Michigan Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$81,992$98,842
Households$66,887$85,544
Married Families$94,355$112,569
Non Families$39,353$53,033

mean

median

Income by Household Type

St. Clair County, Michigan Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

51.8%

Overall Marriage Rate

52.2%

Male Marriage Rate

51.4%

Female Marriage Rate

St. Clair County, Michigan Married by Age and Sex

male

female

St. Clair County, Michigan Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

St. Clair County, Michigan Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

St. Clair County, Michigan Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

9,628

Number of Veterans

9,035

Male Veterans

593

Female Veterans

War
Veterans
Vietnam3,579
First Gulf War1,552
Second Gulf War1,451
Korea681
World War II286

St. Clair County, Michigan Veterans by War

count

Age Group
Veterans
65 to 742,883
75+2,701
35 to 541,870
55 to 641,653
18 to 34521

St. Clair County, Michigan Veterans by Age

count

Name
Veterans
% of Total
White9,1880.07737393471890053
Hispanic1950.050557428052890846
Black1840.06633020908435472
2+ Races1700.04403004403004403
Other Race340.034482758620689655
Native American260.09811320754716982
Asian260.042483660130718956

St. Clair County, Michigan Veterans by Race

St. Clair County, Michigan Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

6.27%

Veteran Poverty Rate

34.78%

Veteran Disability Rate

St. Clair County, Michigan Veterans by Education

LaborForceParticipation

60.2%

Labor Force Participation

56%

Employment Rate

6.7%

Unemployment Rate

St. Clair County, Michigan Employment by Age

LaborForceParticipation

St. Clair County, Michigan Employment by Race

LaborForceParticipation

St. Clair County, Michigan Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

87.68%

Born in St. Clair County, Michigan

98.08%

Native Born

1.92%

Foreign Born

0.87%

Non Citizen

1.05%

Naturalized

Place of Birth

98.08% of St. Clair County, Michigan residents were born in the United States, with 87.68% having been born in Michigan. 0.87% of residents are not US citizens. Of those not born in the United States, the largest percentage are from North America.

St. Clair County, Michigan Place of Birth

Sources