Affton, Missouri Population 2023

20,450

Affton is a city located in Missouri. With a 2023 population of 20,450, it is the 37th largest city in Missouri and the 2266th largest city in the United States.Affton is currently growing at a rate of 0.05% annually and its population has increased by 0.16% since the most recent census, which recorded a population of 20,417 in 2020. Spanning over 5 miles, Affton has a population density of 4,474 people per square mile.

The average household income in Affton is $71,240 with a poverty rate of 9.7%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Affton is 42.8 years, 39.6 years for males, and 44.8 years for females.

Affton Demographics

According to the most recent ACS, the racial composition of Affton was:

  • White: 89.62%
  • Black or African American: 3.29%
  • Asian: 3.21%
  • Two or more races: 2.68%
  • Other race: 1.12%
  • Native American: 0.09%
  • Native Hawaiian or Pacific Islander: 0%
The current population of Affton, Missouri is 20,450 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 20,417.

Affton, Missouri Population 2023

Population by Race

White

Black or African American

Asian

Two or more races

Other race

Native American

Native Hawaiian or Pacific Islander

Affton Population by Race

Affton Population Pyramid 2023

Affton Median Age

42.8

Total

39.6

Male

44.8

Female

Affton Adults

There are 16,310 adults, (3,670 of whom are seniors) in Affton.

Affton Age Dependency

54.9

Age Dependency Ratio

29

Old Age Dependency Ratio

25.9

Child Dependency Ratio

Affton Sex Ratio

Female9,84450.28%
Male9,73649.72%

Affton Population by Age

Affton Renter vs Owner Occupied by Household Type

2.94

Average Family Size

2.23

Average Household Size

75.0%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Affton Households and Families

Male

Female

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Affton Educational Attainment by Sex (over 25)

Affton Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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

The highest rate of bachelors degrees is among other race people with a rate of 65.09%.

Affton Educational Attainment by Race

All

Male

Female

$43,940

Average Earnings

$48,463

Average Male

$37,162

Average Female

Affton Earnings by Educational Attainment

Affton Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Affton Language

82.58% of Affton residents speak only English, while 17.42% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 10.9% of the population.

Affton Language

Affton Poverty by Race

rate

9.7%

Overall Poverty Rate

6.27%

Male Poverty Rate

10.4%

Female Poverty Rate

Poverty in Affton

The race most likely to be in poverty in Affton is Black, with 14.58% below the poverty level.

The race least likely to be in poverty in Affton is Hispanic, with 1.29% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.03%. Among those working part-time, it was 12.97%, and for those that did not work, the poverty rate was 15.87%.

Affton Poverty

Affton Poverty Rate by Education

Affton Poverty Rate by Employment Status and Sex

Affton Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

mean

median

Income by Household Type

Affton Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

49.5%

Overall Marriage Rate

52.2%

Male Marriage Rate

47.1%

Female Marriage Rate

Affton Married by Age and Sex

male

female

Affton Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 35-44.

Affton Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Affton Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,382

Number of Veterans

1,255

Male Veterans

127

Female Veterans

Affton Veterans by War

Affton Veterans by Age

count

Affton Veterans by Race

Affton Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

7.67%

Veteran Poverty Rate

31.84%

Veteran Disability Rate

Affton Veterans by Education

LaborForceParticipation

70.1%

Labor Force Participation

67.6%

Employment Rate

3.5%

Unemployment Rate

Affton Employment by Age

LaborForceParticipation

Affton Employment by Race

LaborForceParticipation

Affton 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

64.82%

Born in Affton

83.48%

Native Born

12.42%

Foreign Born

3.44%

Non Citizen

8.98%

Naturalized

Place of Birth

83.48% of Affton residents were born in the United States, with 64.82% having been born in Missouri. 3.44% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Affton Place of Birth

Note: data after 2020 is projected based on recent growth

Affton Population by Year