St. Clair County, Missouri Population 2024

9,909

St. Clair County, Missouri's estimated 2024 population is 9,909 with a growth rate of 1.61% in the past year according to the most recent United States census data. St. Clair County, Missouri is the 85th largest county in Missouri. The 2010 population was 9,823 and has seen a growth of 0.88% since that time.

Note: data after 2022 is projected based on recent change
Year
Population
Growth
Change
202910,6941571.49%
202810,5371571.51%
202710,3801571.54%
202610,2231571.56%
202510,0661571.58%
20249,9091571.61%
20239,7521571.64%
20229,5951821.93%
20219,413660.71%
20209,347-103-1.09%
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%
18503,556-7,138-66.75%
2024 Growth Rate
1.61% (157)
County Website
St. Clair County
County Seat
Osceola
2020 Population
9,347
Area
675 mi²
Density
15 people/mi²
Growth Since 2020
6.01% (562)
Founded
January 29, 1841

Population by Race

Race
Population
Percentage (of total)
White8,84293.56%
Two or more races4264.51%
Other race750.79%
Black or African American740.78%
Asian230.24%
Native American110.12%
Native Hawaiian or Pacific Islander00%

White

Two or more races

Other race

Black or African American

Asian

Native American

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

47.2

Total

46.5

Male

48.3

Female

St. Clair County, Missouri Adults

There are 7,470 adults, (2,439 of whom are seniors) in St. Clair County, Missouri.

St. Clair County, Missouri Age Dependency

87.9

Age Dependency Ratio

48.5

Old Age Dependency Ratio

39.4

Child Dependency Ratio

St. Clair County, Missouri Sex Ratio

Female4,65449.24%
Male4,79750.76%

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
All4,0902.2675.724.3
Married1,7752.998317
Non Family1,6631.1968.131.9
Female3672.9972.827.2
Male2852.9878.621.4

2.89

Average Family Size

2.26

Average Household Size

75.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

St. Clair County, Missouri Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade6419.32%
Associates Degree5798.42%
Bachelors Degree6629.63%
Graduate Degree2784.04%
High School Graduate3,01243.8%
Less Than 9th Grade1892.75%
Some College1,51622.04%

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

Race
Total
High School
Bachelors
White6,4265,666815
2+ Races305252101
Hispanic1089113
Other Race363610
Black301811
Asian21210
Native American1090

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

The highest rate of bachelors degrees is among black people with a rate of 36.67%.

St. Clair County, Missouri Educational Attainment by Race

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$40,750$50,144$39,453
Graduate Degree$52,969$59,625$49,063
High School Graduate$35,982$41,708$20,658
Less Than 9th Grade$31,106$32,621$18,000
Overall$33,801$40,140$29,658
Some College$31,135$35,110$30,327

$33,801

Average Earnings

$40,140

Average Male

$29,658

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

98.47% of St. Clair County, Missouri residents speak only English, while 1.53% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 1.16% of the population.

St. Clair County, Missouri Language

St. Clair County, Missouri Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White8,5281,25214.68%
Multiple42318443.5%
Hispanic1945427.84%
Other672232.84%
Native11545.45%
Black34411.76%

16.28%

Overall Poverty Rate

14.31%

Male Poverty Rate

18.29%

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 45.45% below the poverty level.

The race least likely to be in poverty in St. Clair County, Missouri is Black, with 11.76% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.45%. Among those working part-time, it was 19.51%, and for those that did not work, the poverty rate was 24.8%.

St. Clair County, Missouri Poverty

rate

Rate
Poverty
Less Than 9th Grade29.16%
High School17.44%
Some College13.07%
Bachelors or Greater11.63%

St. Clair County, Missouri Poverty Rate by Education

rate

Rate
Poverty
Male Unemployed23.68%
Female Employed12.34%
Male Employed6.19%
Female Unemployed4.76%

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

St. Clair County, Missouri Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$61,803$74,132
Households$46,731$60,329
Married Families$67,451$-999,999,999
Non Families$30,722$38,339

mean

median

Income by Household Type

St. Clair County, Missouri Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

49.4%

Overall Marriage Rate

48.4%

Male Marriage Rate

50.5%

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 35-44, 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

691

Number of Veterans

645

Male Veterans

46

Female Veterans

War
Veterans
Vietnam266
First Gulf War184
Second Gulf War124
World War II16
Korea12

St. Clair County, Missouri Veterans by War

count

Age Group
Veterans
75+193
65 to 74184
55 to 64162
35 to 54127
18 to 3425

St. Clair County, Missouri Veterans by Age

count

Name
Veterans
% of Total
White6539.35%
2+ Races205.97%
Other Race1841.86%
Hispanic1812.68%

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

7.23%

Veteran Poverty Rate

51.05%

Veteran Disability Rate

St. Clair County, Missouri Veterans by Education

LaborForceParticipation

50.7%

Labor Force Participation

49.3%

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

69.36%

Born in St. Clair County, Missouri

98.99%

Native Born

1.01%

Foreign Born

0.67%

Non Citizen

0.34%

Naturalized

Place of Birth

98.99% of St. Clair County, Missouri residents were born in the United States, with 69.36% having been born in Missouri. 0.67% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Oceania.

St. Clair County, Missouri Place of Birth

Sources