Lake County, Illinois, a core county of the Chicago-Naperville, IL-IN-WI market, holds $30.8B in deposits across 29 insured institutions and 150 branches. Lake Forest Bank & Trust Company, National Association is the largest deposit holder at 23.0% share. The top three banks hold 50% of deposits, which places the county in the Moderate band. Deposits have grown 14.5% since 2020 while the branch count fell by 14.8%. It produces $65.3B of output, ranking #63 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: 176 in 2020 to 150 in 2025. Institutions: 33 to 29. Top-three share: 42% to 50%.
Institutions by deposits
The 29 insured institutions with a branch presence in this county, per the FDIC Summary of Deposits, 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
Lake 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 8.7% of the market’s output and holds 5.0% of its deposits.
| Measure | Lake County | Share of parent market |
|---|---|---|
| 2024 GDP | $65.3B | 8.7% |
| Deposits | $30.8B | 5.0% |
| Population | 719,339 | 7.2% |
View the full Chicago-Naperville market profile →
Recruiting in Lake County
Deposits are split among a moderate 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 Lake County.
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