County banking markets / IL / 17043
DuPageIllinois
FIPS 17043. Branch offices reported to the FDIC Summary of Deposits, June 30 of each survey year, 1994–2025. One of 102 counties in Illinois’s 2025 survey.
Concentration, 1994–2025
Branch-count HHI squares each institution’s share of the county’s branch offices; deposit HHI squares its share of county deposits. The bands are the 2010 Horizontal Merger Guidelines classification, the dashed line the 1,800 level above which the Federal Reserve reviews a merger centrally. In 2025 this market is unconcentrated on branches (596) and unconcentrated on deposits (932).
Source: FDIC Summary of Deposits | DOJ & FTC, Horizontal Merger Guidelines (2010), section 5.3 | Federal Reserve, Competitive Effects of Mergers and Acquisitions FAQs Both indices computed from the SOD branch rows for this county, June 30 of each survey year. Neither is the Fed's screen HHI: no thrift weighting, no exclusion of specialty and internet banks, no central-booking adjustment. Methodology
Branches and institutions
249 branch offices and 82 institutions in 1994; 250 and 45 in 2025. Deposits booked in the county went from $12.77B to $53.20B, nominal.
Source: FDIC Summary of Deposits FDIC Summary of Deposits, June 30 of each survey year, 1994-2025. Methodology
Who holds the deposits, 2025
Every institution with a branch in the county, ranked by deposits booked here. Both shares are shown because they are the two indices above: squaring and summing the deposit column gives the deposit HHI, the branch column the branch-count HHI.
| # | Institution | Deposits | Deposit share | Branches | Branch share |
|---|---|---|---|---|---|
| 1 | JPMorgan Chase Bank, National Association cert 628 | $11.70B | 22.00% | 28 | 11.20% |
| 2 | PNC Bank, National Association cert 6384 | $5.56B | 10.44% | 14 | 5.60% |
| 3 | BMO Bank National Association cert 16571 | $5.51B | 10.35% | 25 | 10.00% |
| 4 | Fifth Third Bank, National Association cert 6672 | $3.58B | 6.73% | 20 | 8.00% |
| 5 | Hinsdale Bank & Trust Company, National Association cert 33849 | $3.45B | 6.48% | 8 | 3.20% |
| 6 | Wheaton Bank & Trust, National Association cert 33803 | $3.43B | 6.46% | 7 | 2.80% |
| 7 | Citibank, National Association cert 7213 | $2.59B | 4.86% | 9 | 3.60% |
| 8 | U.S. Bank National Association cert 6548 | $2.53B | 4.75% | 19 | 7.60% |
| 9 | Bank of America, National Association cert 3510 | $2.40B | 4.52% | 12 | 4.80% |
| 10 | Old Second National Bank cert 3603 | $1.59B | 3.00% | 22 | 8.80% |
| 11 | Schaumburg Bank & Trust Company, National Association cert 57103 | $1.49B | 2.80% | 4 | 1.60% |
| 12 | Republic Bank of Chicago cert 19333 | $1.10B | 2.07% | 5 | 2.00% |
| 13 | The Huntington National Bank cert 6560 | $1.09B | 2.04% | 18 | 7.20% |
| 14 | Evergreen Bank Group cert 35230 | $907.0M | 1.70% | 2 | 0.80% |
| 15 | Itasca Bank & Trust Co. cert 16666 | $667.4M | 1.25% | 2 | 0.80% |
| 16 | CIBC Bank USA cert 33306 | $588.0M | 1.11% | 1 | 0.40% |
| 17 | The Northern Trust Company cert 913 | $547.7M | 1.03% | 1 | 0.40% |
| 18 | Old National Bank cert 3832 | $415.4M | 0.78% | 4 | 1.60% |
| 19 | Busey Bank cert 16450 | $401.9M | 0.76% | 4 | 1.60% |
| 20 | Lisle Savings Bank cert 29800 | $384.5M | 0.72% | 4 | 1.60% |
| 21 | First American Bank cert 3657 | $366.6M | 0.69% | 7 | 2.80% |
| 22 | Grand Ridge National Bank cert 3674 | $324.8M | 0.61% | 1 | 0.40% |
| 23 | Providence Bank & Trust cert 57754 | $272.0M | 0.51% | 3 | 1.20% |
| 24 | American Commercial Bank & Trust, National Association cert 3719 | $251.2M | 0.47% | 1 | 0.40% |
| 25 | Lakeside Bank cert 19573 | $241.9M | 0.45% | 2 | 0.80% |
| 26 | Byline Bank cert 20624 | $186.9M | 0.35% | 2 | 0.80% |
| 27 | BankFinancial, National Association cert 28808 | $183.9M | 0.35% | 3 | 1.20% |
| 28 | Cathay Bank cert 18503 | $179.8M | 0.34% | 1 | 0.40% |
| 29 | Community Bank of Elmhurst cert 33805 | $176.8M | 0.33% | 2 | 0.80% |
| 30 | Cornerstone National Bank & Trust Company cert 57061 | $139.6M | 0.26% | 1 | 0.40% |
| 31 | Amalgamated Bank of Chicago cert 903 | $127.9M | 0.24% | 1 | 0.40% |
| 32 | FNBC Bank & Trust cert 11306 | $116.1M | 0.22% | 1 | 0.40% |
| 33 | Wells Fargo Bank, National Association cert 3511 | $109.2M | 0.21% | 1 | 0.40% |
| 34 | Parkway Bank and Trust Company cert 19008 | $94.5M | 0.18% | 4 | 1.60% |
| 35 | Hanmi Bank cert 24170 | $86.6M | 0.16% | 1 | 0.40% |
| 36 | Millennium Bank cert 58348 | $86.0M | 0.16% | 1 | 0.40% |
| 37 | First Nations Bank cert 22282 | $78.8M | 0.15% | 1 | 0.40% |
| 38 | Pan American Bank & Trust cert 34108 | $61.0M | 0.11% | 1 | 0.40% |
| 39 | Peoples Bank cert 29523 | $52.1M | 0.10% | 1 | 0.40% |
| 40 | Associated Bank, National Association cert 5296 | $50.7M | 0.10% | 1 | 0.40% |
| 41 | TrustBank cert 14662 | $39.0M | 0.07% | 1 | 0.40% |
| 42 | CIBM Bank cert 11729 | $27.8M | 0.05% | 1 | 0.40% |
| 43 | First Secure Community Bank cert 35223 | $15.6M | 0.03% | 1 | 0.40% |
| 44 | Woodforest National Bank cert 23220 | $2.5M | 0.00% | 1 | 0.40% |
| 45 | BMO Harris Central National Association cert 58216 | $1.0M | 0.00% | 1 | 0.40% |
Source: FDIC Summary of Deposits June 30, 2025. Branch rows grouped by FDIC certificate; names as reported to the survey. Deposit share is n/a where the county's total SOD deposits are zero. Methodology
Back to county banking markets, up to Illinois, or read the methodology for the two HHI constructions and what they cannot tell you.