County banking markets / IL / 17199
WilliamsonIllinois
FIPS 17199. 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 (1,281) and moderately concentrated on deposits (1,551).
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
24 branch offices and 13 institutions in 1994; 42 and 14 in 2025. Deposits booked in the county went from $648.4M to $1.96B, 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 | Banterra Bank cert 17514 | $561.5M | 28.68% | 9 | 21.43% |
| 2 | The Bank of Herrin cert 11310 | $324.7M | 16.59% | 5 | 11.90% |
| 3 | First Southern Bank cert 15565 | $322.8M | 16.49% | 9 | 21.43% |
| 4 | Farmers State Bank of Alto Pass, Ill. cert 11299 | $136.3M | 6.96% | 3 | 7.14% |
| 5 | Peoples National Bank , N.A. cert 3809 | $120.2M | 6.14% | 3 | 7.14% |
| 6 | U.S. Bank National Association cert 6548 | $106.9M | 5.46% | 1 | 2.38% |
| 7 | Fifth Third Bank, National Association cert 6672 | $72.1M | 3.69% | 1 | 2.38% |
| 8 | Legence Bank cert 10886 | $70.1M | 3.58% | 2 | 4.76% |
| 9 | SouthernTrust Bank cert 57897 | $70.0M | 3.58% | 1 | 2.38% |
| 10 | Regions Bank cert 12368 | $66.8M | 3.41% | 1 | 2.38% |
| 11 | First Mid Bank & Trust, National Association cert 3705 | $66.6M | 3.40% | 2 | 4.76% |
| 12 | Southern Illinois Bank cert 35229 | $30.7M | 1.57% | 2 | 4.76% |
| 13 | Woodforest National Bank cert 23220 | $5.4M | 0.27% | 1 | 2.38% |
| 14 | Murphy-Wall State Bank and Trust Company cert 10860 | $3.3M | 0.17% | 2 | 4.76% |
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.