The median income of Mount Prospect residents was an inflation-adjusted $35,543 per year. Mount Prospect had 20,330 households in 2017, with a population of 54,493.
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 – $52,725 more than Mount Prospect. 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 $30,578 less than the median income in Mount Prospect 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.