The median income of St. Charles residents was an inflation-adjusted $38,666 per year. St. Charles had 12,679 households in 2017, with a population of 32,730.
The city with the highest median resident income in the state was Winnetka. Winnetka's median income was $88,268 per year after adjusting for inflation – $49,602 more than St. Charles. It had 4,139 households in 2017 and a population of 12,504.
Bannockburn had the lowest annual resident income among cities in Illinois, with a median income of only $4,965 per year. That was $33,701 less than the median income in St. Charles at the time. Bannockburn had 216 households in 2017 and a population of 1,300.
The table below shows the top 100 cities ranked by median annual resident earnings in 2017.