City · United States

Affton

Affton is an unincorporated community and census-designated place (CDP) in south St. Louis County, Missouri, United States, near St. Louis. The population was 20,417 at the 2020 United States census.

Good to know

• Population: 20,307.
• Area: 12.4 sq km.
• Elevation: 188 m.
• Timezone: America/Chicago.

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