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Affton, Missouri

Census designated place in St. Louis County, Missouri · ZIP 63123

  • St. Louis County
  • Census data · ACS 2019-2023
  • 3 public schools
Join AfftonAsk AfftonBusinessesPeople
  • 20,035 (2019-2023 estimate)Population
  • 8,862Households
  • $77,337Median household income
  • $200,300Median home value
  • 3Public schools
  • 1ZIP codes

About Affton

This page shows only what has been published about Affton: Census facts with their sources first, then its businesses, jobs, events, people in public roles, housing and questions as they are added. Nothing here is written by the town government.

Town intelligenceOfficial sources, refreshed yearly

Population, 2000 to 2020−0.6%
20.3k20.5k20.8k2000: 20,53520002010: 20,30720102020: 20,417202020,53520,417
Population of Affton at each census
CensusPopulation
200020,535
201020,307
202020,417

As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.

Sources: Census 2000 Summary File 1: total population, place level, state 29, retrieved November 14, 2026; Census 2010 Summary File 1: total population, place level, state 29, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 29, retrieved November 14, 2026.

Household income in Affton
Under $50k27%
$50k to $100k36.8%
$100k to $150k19.4%
$150k to $200k11%
$200k and over5.9%

Median household income $77,337 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.

Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, place level, state 29, retrieved November 14, 2026.

Housing tenure in Affton
Owner occupied
7,138 units
Renter occupied
1,724 units
Vacancy rate
4.5%

Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.

Source: American Community Survey 5-year data profile 2019–2023, place level, state 29, retrieved November 14, 2026.

Affton compared with its county and state
Affton compared with its county and state, American Community Survey 2019-2023
MeasureAfftonSt. Louis CountyMissouri
Population20,035996,6186,168,181
Median household income$77,337$81,340$68,920
Median age41.740.238.9
Median home value$200,300$260,700$215,600
Bachelor’s degree or higher35.0%46.9%31.9%
Foreign-born residents13.4%8.1%4.4%
Owner-occupied homes80.5%69.0%67.9%
Mean commute to work23.0 minutes23.3 minutes23.7 minutes

Source: American Community Survey 5-year data profile 2019–2023, place level, state 29, retrieved November 14, 2026.

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Schools

Public schools in Affton3
Public schools in Affton, NCES directory 2023–2024
SchoolTypeGradesDistrict
GOTSCH INTERMEDIATE SCH.Public3–5AFFTON 101
MESNIER PRIMARY SCH.PublicPre-K–2AFFTON 101
AFFTON HIGHPublic9–12AFFTON 101

Open public schools in the NCES directory for 2023–2024, placed by their listed location; private schools are not in the source. Enrollment and ratings are not shown.

Sources: NCES Common Core of Data, public school directory 2023–2024, retrieved November 14, 2026; NCES EDGE public school geocodes 2024–2025, retrieved November 14, 2026.

Frequently asked about AfftonPromoted from questions people asked

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