St. Louis County, Missouri Population 2021

St. Louis County, Missouri's estimated population is 992,177 with a growth rate of -0.10% in the past year according to the most recent United States census data. St. Louis County, Missouri is the null largest county in Missouri. The 2010 Population was 998,840 and has seen a growth of -0.67% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
2021992,177-1,014-0.10%
2020993,191-1,014-0.10%
2019994,205-1,014-0.10%
2018995,219-1,008-0.10%
2017996,227-1,610-0.16%
2016997,837-3,273-0.33%
20151,001,1105800.06%
20141,000,530700.01%
20131,000,460-300-0.03%
20121,000,7607200.07%
20111,000,0401,2000.12%
2010998,8405,3110.53%
1990993,52919,6332.02%
1980973,89622,5432.37%
1970951,353247,82135.23%
1960703,532297,18373.13%
1950406,349132,11948.18%
1940274,23062,63729.60%
1930211,593110,856110.04%
1920100,73718,32022.23%
191082,41732,37764.70%
190050,04013,73337.82%
189036,3074,41913.86%
188031,888-319,301-90.92%
1870351,189160,66584.33%
1860190,52485,54681.49%
1850104,97868,999191.78%
184035,97921,854154.72%
183014,1254,07640.56%
182010,0494,38277.32%
18105,6670.00%
2021 Growth Rate
-0.10%
County Website
Founded
October 1, 1812
County Seat
2010 Population
998,840
Growth Since 2010
-0.67%
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St. Louis County, Missouri Population Growth

Population by Race

Race Population Percentage
White677,30867.94%
Black or African American240,88424.16%
Asian42,9114.30%
Two or More Races24,4802.46%
Some Other Race9,3480.94%
American Indian and Alaska Native1,6210.16%
Native Hawaiian and Other Pacific Islander3670.04%
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St. Louis County, Missouri Population By Race

St. Louis County, Missouri Population Pyramid 2021

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St. Louis County, Missouri Median Age

40.3


Total

38.2


Male

42.3


Female

St. Louis County, Missouri Adults

There are 776,555 adults, (176,150 of whom are seniors) in St. Louis County, Missouri.

St. Louis County, Missouri Age Dependency

66

Age Dependency Ratio

29.3

Old Age Dependency Ratio

36.7

Child Dependency Ratio

St. Louis County, Missouri Sex Ratio

Mujer

523,949

52.56%

Masculino

472,970

47.44%

St. Louis County, Missouri Population by Age

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

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St. Louis County, Missouri Household Types

Type Owner Renter
Married86%14%
All68.6%31.4%
Masculino59.9%40.1%
Non Family55.1%44.9%
Mujer47.9%52.1%

68.6%

Rate of Home Ownership

St. Louis County, Missouri Households and Families

Type Count Average Size Owned
All405,9842.4168.6
Married187,4143.0886
Non Family146,8801.255.1
Mujer55,3753.1447.9
Masculino16,3153.0559.9

3.03

Average Family Size

2.41

Average Household Size

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St. Louis County, Missouri Households by Type

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Education Attained Count Percentage
Less Than 9th Grade12,9331.87%
9th to 12th Grade31,9704.63%
High School Graduate146,33221.20%
Some College144,28120.90%
Associates Degree53,4927.75%
Bachelors Degree171,47424.84%
Graduate Degree129,82918.81%
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St. Louis County, Missouri Educational Attainment by Sex (over 25)

St. Louis County, Missouri Educational Attainment by Race

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Race Total High School Bachelors
White484,808463,044239,477
Black150,513133,06230,911
Asian29,26727,14021,247
Hispanic15,62412,8905,768
2+ Races9,2288,3663,340
Other Race4,6023,4941,245
Native American1,030908243
Islander17215874

The highest rate of high school graduation is among white people with a rate of 95.51%.

The highest rate of bachelors degrees is among asian people with a rate of 72.60%.

St. Louis County, Missouri Educational Attainment by Race

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Name Average Masculino Mujer
Overall$45,277$54,080$38,194
Less Than 9th Grade$23,475$26,611$19,238
High School Graduate$30,634$35,769$26,325
Some College$36,640$43,450$31,798
Bachelors Degree$57,318$73,214$46,298
Graduate Degree$76,344$99,370$61,702

$45,277

Average Earnings

$54,080

Average Male

$38,194

Average Female

St. Louis County, Missouri Earnings by Educational Attainment

St. Louis County, Missouri Language by Age

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St. Louis County, Missouri Language

90.66% of St. Louis County, Missouri residents speak only English, while 9.34% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 3.42% of the population.

St. Louis County, Missouri Language

St. Louis County, Missouri Poverty by Race

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Name Total In Poverty Poverty Rate
Black235,57246,26119.64%
White645,05136,6855.69%
Hispanic28,1944,96917.62%
Asian41,9833,6228.63%
Multiple23,8833,08812.93%
Other9,2642,01921.79%
Native1,62137723.26%
Islander3485315.23%

9.74%

Overall Poverty Rate

8.50%

Male Poverty Rate

10.87%

Female Poverty Rate

Poverty in St. Louis County, Missouri

The race most likely to be in poverty in St. Louis County, Missouri is Native, with 23.26% below the poverty level.

The race least likely to be in poverty in St. Louis County, Missouri is White, with 5.69% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.54%. Among those working part-time, it was 13.45%, and for those that did not work, the poverty rate was 15.64%.

St. Louis County, Missouri Poverty

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Name Poverty
Less Than 9th Grade21.95%
High School11.43%
Some College8.05%
Bachelors or Greater3.20%

St. Louis County, Missouri Poverty Rate by Education

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Name Poverty
Female Unemployed35.24%
Male Unemployed23.53%
Female Employed5.54%
Male Employed3.77%

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

St. Louis County, Missouri Income by Household Type

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Name Median Mean
Households$67,420$100,230
Families$88,604$122,978
Married Families$110,236$147,354
Non Families$40,561$57,533
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Income by Household Type

St. Louis County, Missouri Marital Status

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Marriage Rates

48.5%

Overall Marriage Rate

52.1%

Male Marriage Rate

45.3%

Female Marriage Rate

St. Louis County, Missouri Married by Age and Sex

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St. Louis County, Missouri 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. Louis County, Missouri Marital Status by Race

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St. Louis County, Missouri Marital Status

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55,575

Number of Veterans

51,281

Male Veterans

4,294

Female Veterans

War Veterans
Vietnam21,012
First Gulf War8,590
Second Gulf War7,751
Korea6,158
World War II2,895

St. Louis County, Missouri Veterans by War

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Age Group Veterans
75+16,361
65 to 7416,014
35 to 5410,061
55 to 649,292
18 to 343,847

St. Louis County, Missouri Veterans by Age

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Name Veterans % of Total
White41,0817.50%
Black12,9347.37%
2+ Races7806.38%
Hispanic7684.09%
Asian4151.24%
Other Race2113.51%
Native American1119.15%
Islander4317.41%

St. Louis County, Missouri Veterans by Race

St. Louis County, Missouri Veterans by Education

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4.70%

Veteran Poverty Rate

28.88%

Veteran Disability Rate

St. Louis County, Missouri Veterans by Education

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65.3%

Labor Force Participation

62.2%

Employment Rate

4.7%

Unemployment Rate

St. Louis County, Missouri Employment by Age

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St. Louis County, Missouri Employment by Race

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St. Louis County, Missouri Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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67.11%

Born in St. Louis County, Missouri

92.63%

Native Born

7.37%

Foreign Born

3.37%

Non Citizen

4.01%

Naturalized

Place of Birth

92.63% of St. Louis County, Missouri residents were born in the United States, with 67.11% having been born in Missouri. 3.37% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

St. Louis County, Missouri Place of Birth

  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

Sources