Cost of Living in Frontenac, MO

With a cost of living index of 156, Frontenac, MO is one of the most expensive cities in the United States. Living here is 56% more expensive than the national average and 81% above the Missouri state average of 75. Frontenac is a small community of 3,669 residents.

The median household income in Frontenac is $225,813, which is 200% higher than the national median of $75,149. While incomes are above average, they more than offset the higher cost of living.

Everyday prices in the St. Louis, MO-IL (Metropolitan Statistical Area) metro area are generally below the national average. Out of 6 common items tracked by the Bureau of Labor Statistics, 6 are priced lower than the US average. These real-world prices — from groceries to electricity — add up and should be factored into any cost of living comparison.

Data sources: US Census Bureau (ACS 2023), Zillow Home Values, HUD Fair Market Rents, BEA Regional Price Parities, BLS Average Prices, and NOAA Climate Normals. Updated monthly.