Will County, Illinois, a core county of the Chicago-Naperville, IL-IN-WI market, holds $22.9B in deposits across 34 insured institutions and 159 branches. Old National Bank is the largest deposit holder at 30.6% share. The top three institutions hold 60.2% of deposits, which places the county in the concentrated band. Deposits have grown 46.2% since 2020 while the branch count fell by 12.6%. It produces $38.1B of output, ranking #122 of the 1,523 ranked counties by economic output.
Ranks show where the county stands among the 1,523 ranked counties (those within a Combined or Metropolitan Statistical Area that have a branch). They describe relative position, not a rating of market quality or suitability.
Deposit trend
Branches: 182 in 2020 to 159 in 2025. Institutions: 40 to 34. Top-three share: 52.7% to 60.2%.
Institutions by deposits
The 34 insured institutions with a branch presence in this county, as of June 30, 2025. Five-year change compares the same institution’s county deposits in 2020 and 2025. Institutions are tracked by FDIC certificate number, and where an institution acquired another bank, the acquired bank’s prior deposits are folded into the baseline so the change reflects the combined, continuing franchise rather than reading as new. “No 2020 presence” means neither the institution nor a bank it later absorbed reported deposits in this county that year. Deposit figures are nominal and are not adjusted for inflation.
Part of the Chicago-Naperville market
Will County is one of 19 counties that make up the Chicago-Naperville, IL-IN-WI market, a Combined Statistical Area (ranked #5 of 293 U.S. markets by economic output). It produces 5.1% of the market’s output and holds 3.7% of its deposits.
| Measure | Will County | Share of parent market |
|---|---|---|
| 2024 GDP | $38.1B | 5.1% |
| Deposits | $22.9B | 3.7% |
| Population | 712,253 | 7.1% |
View the full Chicago-Naperville market profile →
Recruiting in Will County
Deposits are held closely by the largest banks, which often means the bankers worth recruiting are inside a small number of institutions. Who holds the deposits, and how contested the market is, shapes both the runway for growth and the competition you would be recruiting against. We recruit commercial relationship managers, banking teams, and market leaders for banks building in markets like Will County.
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