Cost of Living in Lake St. Louis, MO

With a cost of living index of 113, Lake St. Louis, MO is somewhat more expensive than average. Living here is 13% more expensive than the national average and 38% above the Missouri state average of 75. Lake St. Louis is a smaller community of 17,538 residents, where everyday costs can differ substantially from nearby larger cities.

Housing costs are the biggest factor in Lake St. Louis's cost of living. The median monthly rent is $1,608 (22% above the US median of $1,319), and the median home value sits at $375,300 (23% above the national median of $304,900). At current prices, the median home costs roughly 3x the median household income — well within traditional affordability guidelines.

The median household income in Lake St. Louis is $123,427, which is 64% higher than the national median of $75,149. Residents spend roughly 16% of household income on rent. This is a comfortable ratio, well below the 30% threshold that financial experts recommend as a maximum. 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.