City profile · Missouri · Census ACS 2023

Affton, MO

Population, income, housing, safety, climate and schools for Affton - drawn straight from Census ACS, FBI UCR, NOAA, NCES, HUD and FEMA, refreshed on the 2024–2025 release cycle.

20,035
Residents
$77,337
Median income
$200,300
Median home
$1,218
Median rent (state)

Affton - the verdict

Nationally, Affton sits in the 59th percentile for household income among US cities with a population of 1,000 or more. Source: Census ACS.

59th
percentile, household income
43rd
percentile, home value
38th
percentile, median rent
📝 How we sourced this

Population, income, and housing-cost figures come from the U.S. Census Bureau American Community Survey 5-year estimates (B-series tables). Crime data uses FBI UCR; climate uses NOAA Climate Normals; school counts come from NCES Common Core of Data; permits use the Census Building Permits Survey (BPS). See our methodology page for the full ETL pipeline and OMB / FIPS join keys.

Data Snapshot: Affton, MO

Census ACS 2023 estimates count 20,035 residents in Affton, a small city within Missouri. The typical household in Affton brings in $77,337 a year, above the median for U.S. cities on this measure, with a poverty rate of 3.3%. Home values in Affton run a median of $200,300, and the median resident age is 41.7 years. Educational attainment runs 35.0% of adults with a bachelor's degree or higher. Separately, 69.6% of working-age residents are in the labor force.

Living costs in Missouri run below the national norm: BEA Regional Price Parities 2024 puts Missouri at 90.8 on a 100-equals-national-average scale (Well Below Average). A typical two-bedroom carries a HUD Fair Market Rent of $1,218 per month statewide. Monthly utility costs average around $219 across Missouri, per EIA 2023 residential energy estimates. Natural-hazard exposure scores 98.7 out of 100 on FEMA's National Risk Index (Very High).

Population

20,035 residents

Census ACS 2023 - Missouri

Median Household Income

$77,337 /yr

Poverty 3.3%

Cost of Living Index (state)

90.8 (US=100)

Well Below Average - BEA RPP 2024, Missouri average

How does Affton compare to other US cities?

Here's how Affton stacks up against the full field of US cities (population 1,000+), computed live from Census and FBI data.

Household income 59% higher than other cities
Home value 43% pricier than other cities
Median rent 38% pricier than other cities

"Safer than" reflects total crime rate from FBI UCR; the others use Census ACS estimates.

How we calculate these percentiles & ranks

Each percentile compares Affton against every qualifying US city; each in-state rank narrows that to Missouri only. Full formula and direction notes: methodology.

Missouri-relative analysis

Bachelor's Degree or Higher places Affton toward the top of Missouri's cities

Among the 875 Missouri cities PlainCities tracks with reported bachelor's degree or higher data, Affton ranks #121 - the 86th percentile within the state. This is a different, narrower cut than the nationwide percentiles above: it compares Affton only against its own state's cities, not the full US field.

Median Household Income
#166 of 842
80th percentile in Missouri
Median Gross Rent
#108 of 875
69th percentile in Missouri
Median Home Value
#171 of 833
79th percentile in Missouri
Poverty Rate
#681 of 875
22nd percentile in Missouri
Bachelor's Degree or Higher
#121 of 875
86th percentile in Missouri

Ranked by raw value (highest first); a higher rank is not automatically "better" for every measure, see each metric's own context above. This is a comparison within Missouri only, not a livability score. See the methodology for the source and calculation.

59thIncome percentile

59th percentile nationally for median household income. Source: Census ACS 2023 / FBI UCR 2023.

How Affton's home value compares nationally

Median home value vs. every US city (population 1,000+)

$200,300 Among the most affordable more affordable than 57% of 15,600 US cities

$0–$25,000: 5 US cities (0%). Below this entry. $25,000–$50,000: 54 US cities (0%). Below this entry. $50,000–$75,000: 352 US cities (2%). Below this entry. $75,000–$100,000: 1,086 US cities (7%). Below this entry. $100,000–$125,000: 1,516 US cities (10%). Below this entry. $125,000–$150,000: 1,170 US cities (8%). Below this entry. $150,000–$175,000: 1,278 US cities (8%). Below this entry. $175,000–$200,000: 1,229 US cities (8%). Below this entry. $200,000–$225,000: 1,035 US cities (7%). This entry sits in this band. $225,000–$250,000: 976 US cities (6%). Above this entry. $250,000–$275,000: 754 US cities (5%). Above this entry. $275,000–$300,000: 712 US cities (5%). Above this entry. $300,000–$325,000: 521 US cities (3%). Above this entry. $325,000–$350,000: 526 US cities (3%). Above this entry. $350,000–$375,000: 465 US cities (3%). Above this entry. $375,000–$400,000: 393 US cities (3%). Above this entry. $400,000–$425,000: 317 US cities (2%). Above this entry. $425,000–$450,000: 300 US cities (2%). Above this entry. $450,000–$475,000: 307 US cities (2%). Above this entry. $475,000–$500,000: 250 US cities (2%). Above this entry. $500,000–$525,000: 160 US cities (1%). Above this entry. $525,000–$550,000: 156 US cities (1%). Above this entry. $550,000–$575,000: 172 US cities (1%). Above this entry. $575,000–$600,000: 172 US cities (1%). Above this entry. $600,000–$625,000: 163 US cities (1%). Above this entry. $625,000–$650,000: 167 US cities (1%). Above this entry. $650,000–$675,000: 135 US cities (1%). Above this entry. $675,000–$700,000: 101 US cities (1%). Above this entry. $700,000–$725,000: 95 US cities (1%). Above this entry. $725,000–$750,000: 71 US cities (0%). Above this entry. $750,000–$775,000: 65 US cities (0%). Above this entry. $775,000–$800,000: 70 US cities (0%). Above this entry. $800,000–$825,000: 57 US cities (0%). Above this entry. $825,000–$850,000: 67 US cities (0%). Above this entry. $850,000–$875,000: 60 US cities (0%). Above this entry. $875,000–$900,000: 58 US cities (0%). Above this entry. $900,000–$925,000: 47 US cities (0%). Above this entry. $925,000–$950,000: 37 US cities (0%). Above this entry. $950,000–$975,000: 31 US cities (0%). Above this entry. $975,000–$1,000,000: 470 US cities (3%). Above this entry. $1,000,000–$1,025,000: 0 US cities (0%). Above this entry. Affton $0 $1,025,000 every US city, bucketed by value

Each bar is a $25K-wide band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau ACS 5-Year Estimates · 2023

Income distribution context

Household income distribution - Affton, MO Affton, MO's reported median household income shown against the U.S. national quintile-share pattern (not Affton, MO-specific quintile data). The Lorenz curve traces the national cumulative income share against cumulative population share, perfect equality is the diagonal; observed inequality bows below. $ Household Income Distribution Affton, MO median $77,337/yr, vs. U.S. national quintile pattern QUINTILE SHARE OF AGGREGATE INCOME Lowest 20% 3.4% Second 20% 9.2% Middle 20% 15.1% Fourth 20% 23.2% Top 20% 49.1% LORENZ CURVE cumulative income vs. population 100% 0% 100% pop. 0%
Affton, MO's median household income (Census ACS 5-year estimate) plotted against the U.S. national income-quintile distribution pattern for context; the quintile shares and Lorenz curve are national figures, not computed specifically for Affton, MO. Diagonal = perfect equality.

Key socioeconomic indicators

Bachelor's degree or higher (adults 25+) 35.0%

Census ACS S1501, educational attainment

Poverty rate (households below FPL) 3.3%

Census ACS S1701, poverty status

Labor force participation (adults 16+) 69.6%

Census ACS S2301, share of working-age residents in the labor force

Population
20,035
Median Income
$77,337
Median Home Value
$200,300
Median Age
41.7
Poverty Rate
3.3%
Labor force participation
69.6%
Bachelor's Degree+
35.0%

Commute Patterns

How workers travel to work, Census ACS 2023

Drive Alone
76.2%
Carpool
11.2%
Public Transit
0.7%
Walk
0.8%
Work from Home
9.4%
Other
1.7%

Based on 11,462 workers 16 and over.

Monthly Utility Costs

State-average estimates for Missouri - EIA 2023 residential energy data

Electricity
$105
avg/month
Natural Gas
$72
avg/month
Water & Sewer
$42
avg/month
Total Utilities
$219
estimated/month

Estimates reflect Missouri state averages. Actual costs vary by home size, usage, and local rates. Source: U.S. Energy Information Administration (EIA) 2023.

Living Costs & Risk

Cost of living is a Missouri state average from BEA; rent and hazard risk are county-level figures from HUD and FEMA for the county Affton sits in

Cost of Living Index
90.8
Well Below Average
US average = 100 · BEA RPP 2024
Typical 2-BR Rent
$1,218/mo
HUD Fair Market Rent
County-level FMR estimate
Natural Hazard Risk
98.7 / 100
Very High
FEMA NRI composite score (county)

Similar Cities in Missouri

Rolla
20,144 people
Warrensburg
19,437 people
Republic
19,233 people
Arnold
20,884 people
Old Jamestown
21,121 people
Creve Coeur
18,643 people

Cities of a Similar Size Nationwide

Population-matched peers from other states, closest to Affton's 20,035 residents (Census ACS 5-Year 2023).

Alamo, TX
20,008 people
Forest Park, OH
19,994 people
Mayfield Heights, OH
20,082 people
Woodbridge, NJ
20,086 people
Port Angeles, WA
20,087 people
Nanuet, NY
20,089 people

Cities with a Similar Household Income Nationwide

Median-household-income-matched peers from other states, closest to Affton's $77,337 (Census ACS 5-Year 2023, table B19013).

Seminole, FL
$77,335 median income
East Greenville, PA
$77,344 median income
Dibble, OK
$77,321 median income
Collins, WI
$77,321 median income
Eaton Estates, OH
$77,318 median income
Raritan, IL
$77,361 median income

Race & Ethnicity Composition

Race and ethnicity - Affton, MO Race categories sum to one hundred percent per Census methodology. Hispanic or Latino is shown separately as an ethnicity overlay; it cuts across all race categories per OMB Directive 15. Race & Ethnicity Composition Affton, MO - Census ACS, OMB race + ethnicity categories RACE, sums to 100% 82.2% 9.3% ETHNICITY, Hispanic or Latino (any race) 5.8% White 82.2% Black or African American 3.1% Asian 4.3% American Indian 0.0% Native Hawaiian 0.0% Some other race 1.1% Two or more races 9.3% Per OMB Directive 15: Hispanic/Latino ethnicity is reported separately from the race categories.
Race categories sum to 100%. Hispanic or Latino ethnicity is reported separately and cuts across race per Census/OMB methodology.

City-level race and ethnicity, Census ACS 5-year 2023 (tables B02001, B03001), OMB Directive 15 categories.

How Affton compares to nearby Missouri cities

Population + median household income, sourced from Census Bureau ACS 5-year B01001 (population) and B19013 (median household income).

City Population Median Household Income
Affton (this city) 20,035 $77,337
Rolla 20,144 $42,518
Warrensburg 19,437 $57,232
Republic 19,233 $64,364
Census ACS 5-year FIPS MO OMB Bulletin 23-01

What do people ask about Affton, MO?

What is the population of Affton, MO? +

20,035 people live in Affton, MO according to U.S. Census Bureau ACS 2023 estimates.

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

The median household income in Affton is $77,337 per year, based on Census ACS 2023 data.

What is the cost of living in Affton? +

BEA does not publish a city-level cost-of-living figure for Affton; the closest available measure is the Missouri state average, a cost of living index of 90.8 (U.S. average = 100), rated "Well Below Average" based on BEA Regional Price Parities 2024 data. Costs within Missouri vary by metro area.

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

A typical home in Affton is worth $200,300, according to Census ACS 2023 estimates.

Source: U.S. Census Bureau ACS 5-Year 2023, Census ACS B08301/B08136, U.S. Energy Information Administration (EIA) 2023, BEA Regional Price Parities 2024, HUD Fair Market Rents 2026, FEMA National Risk Index.

Read our methodology - how this data is sourced, computed, and verified.

Primary sources: Census ACS, FBI UCR, NOAA Climate Normals, NCES.

Citation & verification links Data sourced from the U.S. Census Bureau. See our methodology for details. Retrieved and formatted by PlainCities

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Every figure on PlainCities is rendered directly from Census ACS source data, no number is typed in by an editor. This page draws directly on Census ACS source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.