Williamson County bank branches Illinois · 42 branches · 14 institutions · $1.96B deposits

Every FDIC-insured bank branch in Williamson County, Illinois as of June 30, 2025. County land area: 420 square miles, 10.0 branches per 100 sq mi.

Branches
42
Institutions
14
Total Deposits
$1.96B
Avg Deposits / Branch
$46.6M

All institutions in Williamson County

InstitutionBranchesDeposits
First Southern Bank 9 $322.8M
Banterra Bank 9 $561.5M
The Bank of Herrin 5 $324.7M
Farmers State Bank of Alto Pass, Ill. 3 $136.3M
Peoples National Bank , N.A. 3 $120.2M
Murphy-Wall State Bank and Trust Company 2 $3.3M
Legence Bank 2 $70.1M
Southern Illinois Bank 2 $30.7M
First Mid Bank & Trust, National Association 2 $66.6M
Regions Bank 1 $66.8M
Woodforest National Bank 1 $5.4M
SouthernTrust Bank 1 $70.0M
U.S. Bank National Association 1 $106.9M
Fifth Third Bank, National Association 1 $72.1M
Reading this. Each branch is counted in the county where it physically sits. Deposits are what each branch reports to the FDIC — for retail-heavy banks this tracks roughly with local economic activity, but a money-center branch can hold deposits from out-of-state corporate accounts. The institution count reflects distinct FDIC certificates, not brand-level rollups (e.g., several regional brand-names may roll up to one FDIC cert).

County metadata. Land area and centroid coordinates from the 2024 Census Gazetteer. FIPS code: 17199.

BankBranches · every U.S. bank branch by county and institution · data from FDIC Summary of Deposits June 30, 2025 · built by Claude