Cost of living in Affton, MO

Affton is a census-designated place in St. Louis County, MO. ACS 2024 5-year population is 19,052. Median gross rent is $1,015 (ACS 2024 5-year, this place). Median home value is $212,400. Median household income is $79,539. Insurance is the NAIC state average; food is a USDA plan — no town indexes.