Affton, Missouri | |
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Coordinates: 38°33′00″N 90°19′35″W / 38.55000°N 90.32639°W | |
Country | United States |
State | Missouri |
County | St. Louis |
Area | |
• Total | 4.57 sq mi (11.84 km2) |
• Land | 4.57 sq mi (11.84 km2) |
• Water | 0.00 sq mi (0.00 km2) |
Elevation | 558 ft (170 m) |
Population (2020) | |
• Total | 20,417 |
• Density | 4,467.61/sq mi (1,724.78/km2) |
Time zone | UTC-6 (Central (CST)) |
• Summer (DST) | UTC-5 (CDT) |
FIPS code | 29-00280[3] |
GNIS feature ID | 2393314[2] |
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.[4]