Affton, MO vs St. Peters, MO

Affton is moderately more affordable than St. Peters, with a 14.8% lower cost of living index. Affton scores 79 compared to 93 for St. Peters, where the US average is 100. This difference means residents of St. Peters can expect to pay noticeably more for everyday expenses, housing, and services.

On the housing front, median rent in Affton is $978/month compared to $1,291/month in St. Peters — a 24% difference. Home values follow the same pattern: Affton is more affordable at $200,300 median vs $252,800.

Median household income in Affton is $77,337 compared to $89,827 in St. Peters (-13.9%). The higher salaries in St. Peters partially offset the cost difference, but don't fully close the gap. Looking at affordability, residents of Affton spend roughly 15.2% of their income on rent, less than the 17.2% in St. Peters.