Affton, MO
Population 20,035 · Missouri
About Affton, MO
Affton is a mid-sized city located in Missouri with a population of 20,035 residents according to the latest US Census Bureau American Community Survey data. The median household income is $77,337 per year, which is 3% above the national median of $75,149. The median age of 41.7 years is close to the US median age of 38.9 years.
Housing Market Overview
The housing market in Affton features a median home value of $200,300, which is 18% below the national median of $244,900. This positions Affton in a moderately priced market relative to the rest of the country. Median monthly rent is $978, 16% below the national average of $1,163/month. Of the 9,278 total housing units, 81% are owner-occupied (7,138 units) and 19% are renter-occupied (1,724 units). The high homeownership rate suggests a stable, established residential community.
Economy & Employment
The local economy in Affton shows an unemployment rate of 2.5%, which is lower than the national rate of 3.7%, indicating a relatively strong job market. The poverty rate stands at 5.6%, below the national average of 12.4%, reflecting generally favorable economic conditions. Workers in Affton have an average one-way commute time of 23 minutes.
Education & Demographics
35.0% of Affton residents aged 25 and older hold a bachelor's degree or higher, compared to the national average of 33.7%. This is in line with national trends in educational attainment. The community's demographic composition includes 2.5% White, 1.3% Hispanic or Latino, 0.2% Black or African American, and 3.2% Asian residents, with 13.4% of the population being foreign-born.
How Affton Ranks in Missouri
Cost of Living in Affton, MO
Compared to national averages, Affton has a median household income of $77,337 (3% above the national median of $75,149). Home values average $200,300, which is 18% below the national median. Monthly rent at $978 is 16% below the US average of $1,163. Within Missouri, Affton's income is 27% above the state average of $61,047, and home values are 33% above the state median of $150,786.
Why Live in Affton, MO?
Affton offers a strong local economy with a median household income of $77,337, well above the national average, and affordable housing with a median home value of $200,300, below the US average of $244,900, and rent that’s lower than the national average at $978/month. Additionally, the city features a strong job market with an unemployment rate of just 2.5%, and a well-educated community where 35.0% of residents hold a bachelor’s degree or higher, and a low poverty rate of 5.6%, better than the national average, and short commute times averaging just 23 minutes.
Affton has a population of 20,035 with a median age of 41.7 years. Compare Affton with other cities to see how it stacks up, or explore all cities in Missouri.
Similar Cities Near Affton
Cities in Missouri with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Rolla | 20,144 | $42,518 | $177,400 | Compare |
| Warrensburg | 19,437 | $57,232 | $216,900 | Compare |
| Republic | 19,233 | $64,364 | $190,300 | Compare |
| Arnold | 20,884 | $75,194 | $209,700 | Compare |
| Old Jamestown | 21,121 | $107,250 | $230,100 | Compare |
| Creve Coeur | 18,643 | $119,454 | $566,100 | Compare |
| Ferguson | 18,350 | $46,106 | $99,300 | Compare |
| Sedalia | 21,869 | $50,668 | $136,500 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in Missouri
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
Compare Affton With Other Cities
Frequently Asked Questions about Affton
What is the population of Affton, MO?
The population of Affton, MO is 20,035 according to the latest US Census Bureau American Community Survey estimates. This makes it a mid-sized city in Missouri.
What is the median household income in Affton?
The median household income in Affton, MO is $77,337 per year, which is 3% above the national median of $75,149.
What is the median home value in Affton?
The median home value in Affton, MO is $200,300, which is 18% below the national median of $244,900. The majority of housing units are owner-occupied.
What is the average rent in Affton?
The median monthly rent in Affton, MO is $978, which is 16% below the national average of $1,163/month.
What is the unemployment rate in Affton?
The unemployment rate in Affton, MO is 2.5%, compared to the national average of 3.7%. This lower-than-average rate suggests a relatively healthy local job market.
Is Affton, MO a good place to live?
Affton offers above-average incomes, affordable housing, and a strong job market. With a population of 20,035 and a median age of 41.7, the city appeals to a broad range of residents.
How educated is Affton, MO?
35.0% of residents in Affton aged 25 and older hold a bachelor's degree or higher, compared to the national average of 33.7%. This above-average educational attainment often reflects a knowledge-based local economy.
What is the cost of living in Affton?
Key cost-of-living indicators for Affton, MO: median home value is $200,300 (18% below national), median rent is $978/month, and median household income is $77,337. The home-value-to-income ratio is 2.6x, indicating relatively affordable housing relative to local incomes.
What is the poverty rate in Affton?
The poverty rate in Affton, MO is 5.6%, compared to the national average of 12.4%. This below-average poverty rate reflects generally favorable economic conditions in the community.
How diverse is Affton, MO?
Affton's population is 2.5% White, 1.3% Hispanic or Latino, 0.2% Black or African American, 3.2% Asian, and 2.9% two or more races. 13.4% of residents are foreign-born.