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Brown County, SD Bank Deposit Market Share

Dacotah Bank holds the largest share of deposits in Brown County, SD, 43.0%, followed by Plains Commerce Bank (14.3%) and Wells Fargo Bank, N.A. (11.1%). 12 institutions hold $2.00B at 16 offices as of June 30, 2026, up 2.5% from 2025.

Institutions: 12 Offices: 16 Deposits: $2.00B Survey: FDIC Summary of Deposits, June 30, 2026

Largest share changes since 2025

Gained: American Bank & Trust (1.15 points); Banknorth (0.54 points); Plains Commerce Bank (0.39 points).

Lost: Dacotah Bank (-2.20 points); U.S. Bank N.A. (-0.31 points); Wells Fargo Bank, N.A. (-0.12 points).

# Institution Offices Deposits Market share Share change from 2025 Deposit change
1 Dacotah Bank 3 $861.9M 43.05% -2.20 pts -2.5%
2 Plains Commerce Bank 1 $285.5M 14.26% +0.39 pts 5.4%
3 Wells Fargo Bank, N.A. 1 $221.3M 11.05% -0.12 pts 1.4%
4 First Interstate Bank 2 $188.7M 9.43% +0.38 pts 6.8%
5 American Bank & Trust 1 $120.3M 6.01% +1.15 pts 26.8%
6 Banknorth 2 $104.6M 5.22% +0.54 pts 14.2%
7 U.S. Bank N.A. 1 $88.2M 4.41% -0.31 pts -4.2%
8 Great Plains Bank 1 $49.1M 2.45% -0.04 pts 0.8%
9 Cortrust Bank N.A. 1 $37.8M 1.89% +0.07 pts 6.3%
10 The First National Bank of Frederick 1 $25.5M 1.27% -0.02 pts 0.6%
11 First Savings Bank 1 $18.8M 0.94% +0.15 pts 22.4%
12 Cornerstone Bank 1 $385K 0.02% +0.02 pts New

About this list

Deposits are those held at each institution's offices in Brown County 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.

Wider markets

South Dakota deposits by institution Aberdeen, SD metro area South Dakota bank directory

Other counties in South Dakota

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