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Williston, ND Metro Area Bank Deposit Market Share

American State Bank & Trust Company of Williston holds the largest share of deposits in the Williston, ND metro area, 27.1%, followed by First International Bank and Trust (22.1%) and First State Bank & Trust (17.1%). 6 institutions hold $2.10B at 11 offices as of June 30, 2026, up 1.7% from 2025.

Institutions: 6 Offices: 11 Deposits: $2.10B Survey: FDIC Summary of Deposits, June 30, 2026

Largest share changes since 2025

Gained: First International Bank and Trust (2.42 points); U.S. Bank N.A. (0.25 points); Gate City Bank (0.25 points).

Lost: The Bank of Tioga (-1.26 points); First State Bank & Trust (-1.20 points); American State Bank & Trust Company of Williston (-0.46 points).

# Institution Offices Deposits Market share Share change from 2025 Deposit change
1 American State Bank & Trust Company of Williston 2 $569.1M 27.05% -0.46 pts 0.0%
2 First International Bank and Trust 2 $465.0M 22.10% +2.42 pts 14.3%
3 First State Bank & Trust 3 $358.7M 17.05% -1.20 pts -4.9%
4 The Bank of Tioga 1 $334.2M 15.88% -1.26 pts -5.7%
5 Gate City Bank 2 $271.2M 12.89% +0.25 pts 3.7%
6 U.S. Bank N.A. 1 $105.4M 5.01% +0.25 pts 7.0%

About this list

Deposits are those held at each institution's offices in Williston, ND (the Census Bureau core based statistical area) as of June 30, 2026, from the FDIC Summary of Deposits, whatever state the institution is headquartered in. Market share is the institution's deposits divided by all deposits in the market. Shares are by bank charter, not rolled up to the holding company, and cover FDIC-insured institutions only, so credit unions are not included. Each office is placed in its county and metro area by the FDIC branch directory; the few offices the directory does not list are left out of the market and of every share.

Share change compares the institution's share in 2025 and 2026 in percentage points. Deposit change compares its deposits here in the two years and includes deposits that moved through mergers and branch sales; "New" means it had no offices here a year earlier. Offices that closed during the year are placed by their ZIP code or city.

Counties in this metro area

Williams County, ND

Statewide deposits

North Dakota

Largest metro areas

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