Top Ten Wealthiest ZIP Codes In Illinois Revealed

Before we even get to the most-monied zip codes in Illinois, one quick question:

Do you know what "zip" in zip code stands for? It stands for "Zone Improvement Plan."

The term was introduced by the US Postal Service in 1963 when they created the ZIP Code system to make mail delivery faster and more efficient. The idea was that by adding a set of standardized numbers to addresses, mail could “zip” through the system with improved sorting and routing.

Here’s a quick breakdown of how ZIP Codes work:

The first digit represents a general region of the US (for example, 6 covers much of the Midwest, including Illinois).
The next two digits narrow it down to a specific sectional center or large city.
The final two digits pinpoint a local post office or delivery area.

In 1983, the USPS expanded the system to include ZIP+4 Codes, which is the regular five digits plus a hyphen and four more numbers, which identify an even more specific location like a city block, apartment group, or business complex.

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Now That We've Got The Background Out Of The Way, Let's Get To The Wealthiest Zip Codes In Illinois

In a recent study by IncomeByZipcode.com, the wealthiest ZIP codes in Illinois have been revealed based on five-year estimates from the United States Census Bureau’s American Community Survey. The result offers a fascinating window into where in our state household incomes reach the highest levels.

Topping the list is ZIP code 60043 (Village of Kenilworth), with an average household income of $460,411 and a median of $250,001. That is a standout figure in the context of Illinois, reflecting high property values, concentrated affluence, and a small-population setting.

Closely following are ZIP code 60022 in Glencoe (average $416,080; median $250,001) and 60093 in Winnetka (average $380,923; median $230,777). Overall, the threshold to crack the top ten was an average household income above roughly $249,000.

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