St. Clair County, Michigan Population 2020

St. Clair County, Michigan's estimated population is 159,213 with a growth rate of -0.14% in the past year according to the most recent United States census data. St. Clair County, Michigan is the 13th largest county in Michigan.

Year Population Growth Growth Rate
2018159,3371240.08%
2017159,213-231-0.14%
2016159,444-305-0.19%
2015159,749-336-0.21%
2014160,085-208-0.13%
2013160,293-330-0.21%
2012160,623-946-0.59%
2011161,569-1,124-0.69%
2010162,69317,08611.73%
1990145,6076,8054.90%
1980138,80218,62715.50%
1970120,17512,97412.10%
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%
187036,66110,05737.80%
186026,60416,184155.32%
185010,4205,814126.23%
18404,6063,492313.46%
18301,1140.00%

How Many People Live in St. Clair County, Michigan?

159,213

St. Clair County, Michigan Population Growth

Population by Race

Race Population Percentage
White149,21693.51%
Two or More Races4,6252.90%
Black or African American3,3932.13%
Asian1,0820.68%
Some Other Race9370.59%
American Indian and Alaska Native2750.17%
Native Hawaiian and Other Pacific Islander380.02%

St. Clair County, Michigan Population Pyramid 2020

St. Clair County, Michigan Median Age

43.5


Total

42.3


Male

44.7


Female

St. Clair County, Michigan Adults

There are 125,445 adults, (28,275 of whom are seniors) in St. Clair County, Michigan.

St. Clair County, Michigan Age Dependency

64.2

Age Dependency Ratio

29.1

Old Age Dependency Ratio

35.1

Child Dependency Ratio

St. Clair County, Michigan Sex Ratio

Female

80,266

50.30%

Male

79,300

49.70%

St. Clair County, Michigan Households and Families

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

St. Clair County, Michigan Household Types

Type Owner Renter
Married90%10%
All76.8%23.2%
Male74.7%25.3%
Non Family64.7%35.3%
Female52.1%47.9%

76.8%

Rate of Home Ownership

Type Count Average Size Owned
All64,8052.4476.8
Married33,0673.0390
Non Family21,8811.2364.7
Female6,8323.1352.1
Male3,0253.1274.7

2.96

Average Family Size

2.44

Average Household Size

7.1%

Unmarried (Opposite Sex)

0.2%

Unmarried (Same Sex)

St. Clair County, Michigan Education

Education Attained Count Percentage
Less Than 9th Grade2,4192.15%
9th to 12th Grade8,2707.36%
High School Graduate38,62834.37%
Some College29,06925.87%
Associates Degree13,43111.95%
Bachelors Degree13,05011.61%
Graduate Degree7,5146.69%

St. Clair County, Michigan Educational Attainment by Race

Name Total High School Bachelors
White105,05195,48919,236
Hispanic2,7162,296406
Black2,3181,929347
Multiple Races1,5011,329259
Asian741643284
Other Race591486161
Native American2071417
Islander292917

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among islander people with a rate of 58.62%.

Name Average Male Female
Overall$37,087$48,744$27,402
Less Than High School$21,141$27,357$12,467
High School Grad$31,000$41,096$20,801
Some College$36,877$51,665$27,389
Bachelors Degree$50,534$65,998$39,104
Graduate Degree$65,601$84,181$59,273

$37,087

Average Earnings

$48,744

Average Male

$27,402

Average Female

St. Clair County, Michigan Language

St. Clair County, Michigan Language by Age

St. Clair County, Michigan Language

96.88% of St. Clair County, Michigan residents speak only English, while 3.12% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 1.27% of the population.

St. Clair County, Michigan Poverty

St. Clair County, Michigan Poverty by Race

Name Total In Poverty Poverty Rate
White144,11417,40512.08%
Multiple4,5431,75238.56%
Hispanic5,1051,03020.18%
Black3,18670422.10%
Asian1,07315814.73%
Other90815717.29%
Native265197.17%
Islander38821.05%

13.32%

Overall Poverty Rate

11.05%

Male Poverty Rate

15.55%

Female Poverty Rate

Poverty in St. Clair County, Michigan

The race most likely to be in poverty in St. Clair County, Michigan is Multiple, with 38.56% below the poverty level.

The race least likely to be in poverty in St. Clair County, Michigan is Native, with 7.17% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.34%. Among those working part-time, it was 17.25%, and for those that did not work, the poverty rate was 17.16%.

Name Poverty
Less Than High School26.83%
High School11.09%
Some College9.30%
Bachelors or Greater4.03%

St. Clair County, Michigan Income

St. Clair County, Michigan Income by Household Type

Name Median Mean
Households$55,240$71,761
Families$69,989$83,415
Married Families$79,315$93,923
Non Families$31,135$45,051

St. Clair County, Michigan Marital Status

St. Clair County, Michigan Marital Status

Marriage Rates

52.3%

Overall Marriage Rate

52.9%

Male Marriage Rate

51.7%

Female Marriage Rate

St. Clair County, Michigan Married by Age and Sex

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 45-54.

St. Clair County, Michigan Marital Status by Race

St. Clair County, Michigan Veterans

11,369

Number of Veterans

10,631

Male Veterans

738

Female Veterans

War Veterans
Vietnam4,466
First Gulf War1,727
Second Gulf War1,340
Korea1,107
World War II488
Name Veterans % of Total
White10,9909.26%
Hispanic2005.91%
Black1575.91%
2 or More1205.36%
Other283.87%
Asian273.34%
Indian2610.32%
Hawaiian2172.41%

$St. Clair County, Michigan Veterans by Education

5.99%

Veteran Poverty Rate

35.50%

Veteran Disability Rate

St. Clair County, Michigan Employment Status

60.5%

Labor Force Participation

56.4%

Employment Rate

6.7%

Unemployment Rate

St. Clair County, Michigan Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

86.51%

Born in Michigan

97.34%

Native Born

2.66%

Foreign Born

1.03%

Non Citizen

Place of Birth

97.34% of St. Clair County, Michigan residents were born in the United States, with 86.51% having been born in Michigan. 1.03% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990