Banks in Williams County, North Dakota
11 active bank branches operated by 6 institutions, per FDIC records.
Active branches
11
Banks present
6
Deposits (2026)
$2.1B
Closings since 2020
1
1 openings
Largest banks by deposits in Williams County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| American State Bank & Trust Company of Williston | $569M | 27.1% | 2 |
| First International Bank & Trust | $465M | 22.1% | 2 |
| First State Bank & Trust | $359M | 17.1% | 3 |
| The Bank of Tioga | $334M | 15.9% | 1 |
| Gate City Bank | $271M | 12.9% | 2 |
| U.S. Bank | $105M | 5% | 1 |
Deposit location reflects the office to which deposits are reported and may not represent the residence of depositors.
Cities and towns
Transcribed from FDIC BankFind Suite active-location records and the annual Summary of Deposits. County assignment follows the FDIC branch record.