Affton CDP, Missouri Demographics & Population 2026

Name: Affton CDP, Missouri Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

As of 2026, Affton CDP, Missouri has a total population of 20,035, the 39th largest city in Missouri, with a median household income of $77,337, which is 12% higher than the state average. The poverty rate is 5.6%.

Key Takeaways

Near full employment with an unemployment rate of just 2.5%.

Affton CDP Quick Facts

Population 20,035

Median Household Income $77,337

Median Home Value $200,300

Poverty Rate 5.6%

Unemployment Rate 2.5%

Median Age 41.7 years

Homeownership Rate 80.5%

Affordability Ratio 2.6x

Bachelor's Degree or Higher 35.0%

High School Graduation Rate 92.6%

Diversity Index 34/100

Population 20,035 39th of 1,062

Median Income $77,337 top 20%

Poverty Rate 5.6% 55% lower national

Median Home Value $200,300 top 20%

How Affton CDP Compares

Median Household Income

Affton CDP

$77,337

$68,920

National

$78,538

Median Home Value

Affton CDP

$200,300

$215,600

National

$303,400

Economy & Housing

Household Income Distribution

Under $25K 11.1%

$25K-$50K 15.8%

$50K-$100K 36.8%

$100K+ 36.2%

Employment

2.5% Unemployment Rate State: 4.1% | National: 5.2%

71.4% Labor Force Participation

Housing Overview

Owner 80.5%

Renter 19.4%

Affordability Index Very Affordable

2.6x home value to income ratio

People & Demographics

Age Distribution

Under 18

18.7%

18-34

20.8%

35-54

26.3%

55-74

26.5%

75+

7.7%

Race & Ethnicity

Diversity Index

Low Diversity

A less diverse community where one racial or ethnic group represents a large majority.

State average: 39 | National average: 60

Education

Educational Attainment (Adults 25+)

Affton CDP Rankings in Missouri

#39 Population of 1,062

#189 Median Income of 1,062

#138 Education of 1,062

#185 Home Value of 1,062

Explore Missouri Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Cities Similar to Affton CDP

These cities in the same state have comparable population and economic profiles.

City	Population	Median Income	Home Value	Bachelor's+	Poverty
Arnold city	20,884	$75,194	$209,700	24.0%	7.7%
Republic city	19,233	$64,364	$190,300	27.5%	15.7%
Ozark city	21,953	$69,372	$230,600	33.0%	14.2%
Concord CDP	18,028	$84,389	$279,400	42.0%	4.3%
Warrensburg city	19,437	$57,232	$216,900	35.9%	18.3%

Population Overview

Affton CDP is a small city located in Missouri. The total population is 20,035. It ranks as the 39th most populous out of 1,062 cities and towns in Missouri.

Age Demographics

The median age in Affton CDP is 41.7 years. This is 7% higher than the state median of 38.9 years.

Economy, Income & Housing

The median household income in Affton CDP is $77,337. This is 12% higher than the state median of $68,920. Compared to the national median of $78,538, household income here is 2% lower. The poverty rate stands at 5.6%. This is 56% lower than the state poverty rate of 12.6%. The unemployment rate is 2.5%. This is 40% lower than the state rate of 4.1%. The median home value is $200,300. Housing costs are 7% lower than the state median of $215,600. With a home-value-to-income ratio of just 2.6x, Affton CDP is one of the most affordable housing markets in the area. 80.5% of occupied housing units are owner-occupied. This homeownership rate is 19% higher than the state average of 67.9%.

Race & Ethnicity

The largest racial or ethnic group in Affton CDP is White (non-Hispanic), making up 80.2% of the population. Hispanic or Latino residents account for 5.9%. The Black or African American population (2.9%) is well below the state average of 11.0%. The Asian population is significantly higher than the state average (4.3% vs 2.1%).

Education

35.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 10% higher than the state rate of 31.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.6%.

Data Sources & Methodology

All demographic data for Affton CDP, Missouri is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Missouri state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,062 Census-designated places in Missouri. For official data, visit data.census.gov.

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Frequently Asked Questions

What is the population of Affton CDP, Missouri?

Affton CDP, Missouri has a population of 20,035 according to the most recent U.S. Census ACS 5-Year Estimates.

What is the median household income in Affton CDP, MO?

The median household income in Affton CDP is $77,337, which is 2% lower the national median of $78,538.

What is the poverty rate in Affton CDP, MO?

The poverty rate in Affton CDP is 5.6%. This means approximately 1,111 residents live below the federal poverty line.

What is the racial makeup of Affton CDP, Missouri?

Affton CDP's population is 80.2% White, 2.9% Black, 5.9% Hispanic/Latino, and 4.3% Asian.

What is the median home value in Affton CDP, MO?

The median home value in Affton CDP is $200,300. The home-value-to-income ratio is 2.6x.

How educated is Affton CDP, Missouri?

35.0% of adults (25+) in Affton CDP hold a bachelor's degree or higher, and 14.5% hold a graduate or professional degree.