Affton is a city located in St. Louis County and St. Louis city Missouri. Affton has a 2024 population of 20,264. Affton is currently growing at a rate of 0.85% annually and its population has increased by 3.49% since the most recent census, which recorded a population of 19,580 in 2020.
The average household income in Affton is $93,357 with a poverty rate of 5.87%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Affton is 42.1 years, 40.1 years for males, and 43.9 years for females.
According to the most recent ACS, the racial composition of Affton was:
White
Two or more races
Asian
Black or African American
Other race
Native American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 8,899 | 2.24 | 77.5 | 22.5 |
| Non Family | 3,871 | 1.15 | 64.6 | 35.4 |
| Married | 3,786 | 3.08 | 92.2 | 7.8 |
| Female | 821 | 3.04 | 70.5 | 29.5 |
| Male | 421 | 3.13 | 78.4 | 21.6 |
3
Average Family Size
2.24
Average Household Size
77.5%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
The highest rate of high school graduation is among 2+ races people with a rate of 97.82%.
The highest rate of bachelors degrees is among 2+ races people with a rate of 40.03%.
All
Male
Female
$49,120
Average Earnings
$56,074
Average Male
$39,701
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
84.85% of Affton residents speak only English, while 15.15% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 7.91% of the population.
rate
5.87%
Overall Poverty Rate
5.38%
Male Poverty Rate
6.37%
Female Poverty Rate
The race most likely to be in poverty in Affton is Black, with 19% below the poverty level.
The race least likely to be in poverty in Affton is Multiple, with 1.31% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 0.93%. Among those working part-time, it was 6.83%, and for those that did not work, the poverty rate was 13.84%.
Married
Widowed
Divorced
Separated
NeverMarried
47.6%
Overall Marriage Rate
49.2%
Male Marriage Rate
46.0%
Female Marriage Rate
male
female
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.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
10.12%
Veteran Poverty Rate
36.06%
Veteran Disability Rate
LaborForceParticipation
70.7%
Labor Force Participation
69.3%
Employment Rate
1.9%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
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.
Europe
Asia
Africa
Oceania
Latin America
North America
69.74%
Born in Affton
88.11%
Native Born
11.89%
Foreign Born
4.12%
Non Citizen
7.78%
Naturalized
88.11% of Affton residents were born in the United States, with 69.74% having been born in Missouri. 4.12% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2024 | 20,264 | 171 | 0.85% |
| 2023 | 20,093 | 171 | 0.86% |
| 2022 | 19,922 | 997 | 5.27% |
| 2021 | 18,925 | -655 | -3.35% |
| 2020 | 19,580 | -568 | -2.82% |
| 2019 | 20,148 | -39 | -0.19% |
| 2018 | 20,187 | -1,517 | -6.99% |
| 2017 | 21,704 | -356 | -1.61% |
| 2016 | 22,060 | 715 | 3.35% |
| 2015 | 21,345 | -13 | -0.06% |
| 2014 | 21,358 | -1 | 0% |
| 2013 | 21,359 | 1,414 | 7.09% |
| 2012 | 19,945 | -151 | -0.75% |
| 2011 | 20,096 | -211 | -1.04% |
| 2010 | 20,307 | 0 | 0% |