St. Clair County, Missouri Population 2024

9,920

St. Clair County, Missouri's estimated 2024 population is 9,920 with a growth rate of 1.76% in the past year according to the most recent United States census data. St. Clair County, Missouri is the 87th largest county in Missouri. The 2010 population was 9,823 and has seen a growth of 0.99% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202910,7801721.62%
202810,6081721.65%
202710,4361721.68%
202610,2641721.7%
202510,0921721.73%
20249,9201721.76%
20239,7481721.8%
20229,5761721.83%
20219,404530.57%
20209,351-99-1.05%
20199,450190.2%
20189,431360.38%
20179,395850.91%
20169,310-117-1.24%
20159,427-19-0.2%
20149,446-53-0.56%
20139,499-34-0.36%
20129,533-161-1.66%
20119,694-129-1.31%
20109,82300%
19908,457-165-1.91%
19808,62295512.46%
19707,667-754-8.95%
19608,421-2,061-19.66%
195010,482-2,664-20.26%
194013,146-143-1.08%
193013,289-2,052-13.38%
192015,341-1,071-6.53%
191016,412-1,495-8.35%
190017,9071,1606.93%
189016,7472,62218.56%
188014,1257,383109.51%
18706,742-70-1.03%
18606,8123,25691.56%
18503,556-7,224-67.01%
showing: 35 rows
2024 Growth Rate
1.76% (172)
County Website
St. Clair County
County Seat
2020 Population
9,351
Area
675 mi²
Density
15 people/mi²
Growth Since 2020
6.08% (569)
Founded
January 29, 1841

St. Clair County, Missouri Population 2024

Population by Race

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Race
Population
Percentage (of total)
White8,70993.34%
Two or more races4194.49%
Other race961.03%
Black or African American510.55%
Native American370.4%
Asian180.19%
Native Hawaiian or Pacific Islander00%

White

Two or more races

Other race

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

St. Clair County, Missouri Population by Race

St. Clair County, Missouri Population Pyramid 2024

St. Clair County, Missouri Median Age

48.2

Total

47.4

Male

49.4

Female

St. Clair County, Missouri Adults

There are 7,425 adults, (2,439 of whom are seniors) in St. Clair County, Missouri.

St. Clair County, Missouri Age Dependency

87.1

Age Dependency Ratio

48.9

Old Age Dependency Ratio

38.2

Child Dependency Ratio

St. Clair County, Missouri Sex Ratio

Female4,59349.23%
Male4,73750.77%

St. Clair County, Missouri Population by Age

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

Household Type
Count
Average Size
Owner
Renter
All3,9552.376.423.6
Married1,9102.9582.717.3
Non Family1,5031.1571.928.1
Female3473.116832
Male1953.3165.134.9

2.87

Average Family Size

2.3

Average Household Size

76.4%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

St. Clair County, Missouri Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

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

St. Clair County, Missouri Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among black people with a rate of 100%.

The highest rate of bachelors degrees is among 2+ races people with a rate of 30.33%.

St. Clair County, Missouri Educational Attainment by Race

All

Male

Female

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$32,060

Average Earnings

$37,308

Average Male

$27,005

Average Female

St. Clair County, Missouri Earnings by Educational Attainment

St. Clair County, Missouri Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

St. Clair County, Missouri Language

98.35% of St. Clair County, Missouri residents speak only English, while 1.65% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 0.96% of the population.

St. Clair County, Missouri Language

St. Clair County, Missouri Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White8,3571,15613.83%
Multiple41416640.1%
Hispanic2026532.18%
Other893640.45%
Native373183.78%
Black7457.14%

15.74%

Overall Poverty Rate

14.62%

Male Poverty Rate

16.88%

Female Poverty Rate

Poverty in St. Clair County, Missouri

The race most likely to be in poverty in St. Clair County, Missouri is Native, with 83.78% below the poverty level.

The race least likely to be in poverty in St. Clair County, Missouri is White, with 13.83% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.68%. Among those working part-time, it was 20.22%, and for those that did not work, the poverty rate was 24.11%.

St. Clair County, Missouri Poverty

rate

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Rate
Poverty
Less Than 9th Grade29.76%
High School19%
Some College12.92%
Bachelors or Greater10.91%

St. Clair County, Missouri Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed20.59%
Male Unemployed19.67%
Female Employed11.41%
Male Employed8.07%

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

St. Clair County, Missouri Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

St. Clair County, Missouri Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

53.4%

Overall Marriage Rate

53.3%

Male Marriage Rate

53.4%

Female Marriage Rate

St. Clair County, Missouri Married by Age and Sex

male

female

St. Clair County, Missouri Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 45-54.

St. Clair County, Missouri Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

St. Clair County, Missouri Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

727

Number of Veterans

679

Male Veterans

48

Female Veterans

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St. Clair County, Missouri Veterans by War

count

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St. Clair County, Missouri Veterans by Age

count

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St. Clair County, Missouri Veterans by Race

St. Clair County, Missouri Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

9.57%

Veteran Poverty Rate

54.93%

Veteran Disability Rate

St. Clair County, Missouri Veterans by Education

LaborForceParticipation

50.4%

Labor Force Participation

49%

Employment Rate

2.5%

Unemployment Rate

St. Clair County, Missouri Employment by Age

LaborForceParticipation

St. Clair County, Missouri Employment by Race

LaborForceParticipation

St. Clair County, Missouri 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

69.89%

Born in St. Clair County, Missouri

99.08%

Native Born

0.92%

Foreign Born

0.34%

Non Citizen

0.58%

Naturalized

Place of Birth

99.08% of St. Clair County, Missouri residents were born in the United States, with 69.89% having been born in Missouri. 0.34% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

St. Clair County, Missouri Place of Birth

Sources