Affton, MO
Demographics And Statistics

Demographics | Cost Of Living
Updated: 2025-10-25

Living In Affton, Missouri Summary

Life in Affton research summary. HomeSnacks has been using Saturday Night Science to research the quality of life in Affton over the past nine years using Census, FBI, Zillow, and other primary data sources. Based on the most recently available data, we found the following about life in Affton:

  • The population in Affton is 20,035.

  • The median home value in Affton is $237,012.

  • The median income in Affton is $77,337.

  • The cost of living in Affton is 93 which is 0.9x lower than the national average.

  • The median rent in Affton is $978.

  • The unemployment rate in Affton is 2.5%.

  • The poverty rate in Affton is 5.6%.

  • The average high in Affton is 66.2° and the average low is 47.0°.

Affton SnackAbility

6
Overall SnackAbility
Jobs
8/10
Housing
7
Affordability
8.5
Diversity
6
Safety
N/A
Amenities
9
Education
8
Commute
8

Affton, MO Cost Of Living

Cost of living in Affton summary. We use data on the cost of living to determine how expensive it is to live in Affton. Real estate prices drive most of the variance in cost of living around Missouri. Key points include:

  • The cost of living in Affton is 93 with 100 being average.

  • The cost of living in Affton is 0.9x lower than the national average.

  • The median home value in Affton is $237,012.

  • The median income in Affton is $77,337.

93
Affton's Overall Cost Of Living
0.9x
Lower Than The National Average

Cost Of Living In Affton Comparison Table

Living Expense Affton Missouri National Average
Overall 93 88 100
Services 94 93 100
Groceries 98 96 100
Health 90 91 100
Housing 88 78 100
Transportation 94 90 100
Utilities 104 99 100

Affton, MO Weather

  • The average high in Affton is 66.2° and the average low is 47.0°.

  • There are 75.4 days of precipitation each year.

  • Expect an average of 43.9 inches of precipitation each year with 15.7 inches of snow.

StatAffton
Average Annual High66.2
Average Annual Low47.0
Annual Precipitation Days75.4
Average Annual Precipitation43.9
Average Annual Snowfall15.7
66.2°
Average High
75.4
Days of Rain

Rankings for Affton in Missouri

Locations Around Affton

Map Of Affton, MO

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1

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3

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4

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5

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6

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7

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8

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9

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10

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Affton Demographics And Statistics

Population over time in Affton

The current population in Affton is 20,035. The population has decreased -0.4% from 2010.

Year Population % Change
2023 20,035 0.6%
2022 19,922 5.3%
2021 18,925 -3.3%
2020 19,580 -2.8%
2019 20,148 -0.2%
2018 20,187 -7.0%
2017 21,704 -1.6%
2016 22,060 3.3%
2015 21,345 -0.1%
2014 21,358 -0.0%
2013 21,359 7.1%
2012 19,945 -0.8%
2011 20,096 -0.1%
2010 20,115 -

Race / Ethnicity in Affton

White
80.2% (16,074)
African American
2.9% (579)
American Indian
0.0% (0)
Asian
4.3% (871)
Hawaiian
0.0% (0)
Other
0.1% (21)
Two Or More
6.6% (1,317)
Hispanic
5.9% (1,173)

Affton is:

  • 80.2% White with 16,074 White residents.

  • 2.9% African American with 579 African American residents.

  • 0.0% American Indian with 0 American Indian residents.

  • 4.3% Asian with 871 Asian residents.

  • 0.0% Hawaiian with 0 Hawaiian residents.

  • 0.1% Other with 21 Other residents.

  • 6.6% Two Or More with 1,317 Two Or More residents.

  • 5.9% Hispanic with 1,173 Hispanic residents.

Race Affton MO USA
White 80.2% 76.8% 58.2%
African American 2.9% 11.0% 12.0%
American Indian 0.0% 0.2% 0.5%
Asian 4.3% 2.1% 5.7%
Hawaiian 0.0% 0.1% 0.2%
Other 0.1% 0.4% 0.5%
Two Or More 6.6% 4.4% 3.9%
Hispanic 5.9% 5.1% 19.0%

Gender in Affton

Female
50.6% (10,144)
Male
49.4% (9,891)
  • Affton is 50.6% female with 10,144 female residents.

  • Affton is 49.4% male with 9,891 male residents.

Gender Affton MO USA
Female 50.6% 50.7% 50.5%
Male 49.4% 49.3% 49.5%

Highest level of educational attainment in Affton for adults over 25

  • 3.0% of adults in Affton completed < 9th grade.

  • 4.0% of adults in Affton completed 9-12th grade.

  • 24.0% of adults in Affton completed high school / ged.

  • 22.0% of adults in Affton completed some college.

  • 12.0% of adults in Affton completed associate's degree.

  • 20.0% of adults in Affton completed bachelor's degree.

  • 11.0% of adults in Affton completed master's degree.

  • 3.0% of adults in Affton completed professional degree.

  • 1.0% of adults in Affton completed doctorate degree.

< 9th Grade
3.0% (601)
9-12th Grade
4.0% (801)
High School / GED
24.0% (4,808)
Some College
22.0% (4,407)
Associate's Degree
12.0% (2,404)
Bachelor's Degree
20.0% (4,007)
Master's Degree
11.0% (2,203)
Professional Degree
3.0% (601)
Doctorate Degree
1.0% (200)
Education Affton MO USA
< 9th Grade 3.0% 3.0% 5.0%
9-12th Grade 4.0% 6.0% 6.0%
High School / GED 24.0% 30.0% 26.0%
Some College 22.0% 21.0% 19.0%
Associate's Degree 12.0% 8.0% 9.0%
Bachelor's Degree 20.0% 20.0% 21.0%
Master's Degree 11.0% 9.0% 10.0%
Professional Degree 3.0% 2.0% 2.0%
Doctorate Degree 1.0% 1.0% 2.0%

Household Income For Affton, Missouri

  • 3.4% of households in Affton earn Less than $10,000.

  • 3.1% of households in Affton earn $10,000 to $14,999.

  • 4.6% of households in Affton earn $15,000 to $24,999.

  • 5.0% of households in Affton earn $25,000 to $34,999.

  • 10.9% of households in Affton earn $35,000 to $49,999.

  • 20.8% of households in Affton earn $50,000 to $74,999.

  • 16.0% of households in Affton earn $75,000 to $99,999.

  • 19.4% of households in Affton earn $100,000 to $149,999.

  • 11.0% of households in Affton earn $150,000 to $199,999.

  • 5.9% of households in Affton earn $200,000 or more.

Less than $10,000
3.4% (67,145)
$10,000 to $14,999
3.1% (63,075)
$15,000 to $24,999
4.6% (92,691)
$25,000 to $34,999
5.0% (99,700)
$35,000 to $49,999
10.9% (217,712)
$50,000 to $74,999
20.8% (415,982)
$75,000 to $99,999
16.0% (321,482)
$100,000 to $149,999
19.4% (388,627)
$150,000 to $199,999
11.0% (219,747)
$200,000 or more
5.9% (117,334)
Income Affton MO USA
Less than $10,000 3.4% 4.8% 4.9%
$10,000 to $14,999 3.1% 4.0% 3.6%
$15,000 to $24,999 4.6% 7.6% 6.6%
$25,000 to $34,999 5.0% 7.9% 6.8%
$35,000 to $49,999 10.9% 12.2% 10.4%
$50,000 to $74,999 20.8% 17.5% 15.7%
$75,000 to $99,999 16.0% 13.3% 12.7%
$100,000 to $149,999 19.4% 16.9% 17.4%
$150,000 to $199,999 11.0% 7.7% 9.3%
$200,000 or more 5.9% 8.1% 12.6%

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