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Union County, SD Bank Deposit Market Share

Liberty National Bank holds the largest share of deposits in Union County, SD, 31.3%, followed by Premier Bank (19.8%) and First Savings Bank (13.9%). 9 institutions hold $773.2M at 11 offices as of June 30, 2026, up 2.2% from 2025.

Institutions: 9 Offices: 11 Deposits: $773.2M Survey: FDIC Summary of Deposits, June 30, 2026

Largest share changes since 2025

Gained: First Savings Bank (1.38 points); Peoples Bank (0.76 points); Security National Bank of South Dakota (0.38 points).

Lost: Pioneer Bank (-1.85 points); Central Bank (-0.87 points); Liberty National Bank (-0.31 points).

# Institution Offices Deposits Market share Share change from 2025 Deposit change
1 Liberty National Bank 3 $242.3M 31.34% -0.31 pts 1.2%
2 Premier Bank 1 $152.8M 19.77% +0.20 pts 3.2%
3 First Savings Bank 1 $107.4M 13.89% +1.38 pts 13.5%
4 Security National Bank of South Dakota 1 $89.3M 11.55% +0.38 pts 5.7%
5 Central Bank 1 $56.1M 7.25% -0.87 pts -8.7%
6 Pioneer Bank 1 $51.6M 6.67% -1.85 pts -20.0%
7 First Dakota National Bank 1 $43.4M 5.61% +0.03 pts 2.7%
8 Peoples Bank 1 $18.9M 2.44% +0.76 pts 48.7%
9 1st Financial Bank USA 1 $11.4M 1.48% +0.28 pts 25.7%

About this list

Deposits are those held at each institution's offices in Union 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 Sioux City, IA-NE-SD metro area South Dakota bank directory

Other counties in South Dakota

Lincoln CountyMinnehaha CountyPennington CountyBrookings CountyBrown CountyHughes CountyCodington CountyYankton CountyDavison CountyZiebach CountyLawrence CountyBeadle CountyHutchinson CountyLake CountyMeade CountyCharles Mix CountyRoberts CountyWalworth CountyClay CountyGrant CountyBrule CountyButte CountyHaakon CountyTurner CountyTripp CountyKingsbury CountySpink CountyGregory CountyBon Homme CountyDay CountyHamlin CountyEdmunds CountyAurora CountyPotter CountyMccook CountyHand CountyPerkins CountyDeuel CountyClark CountyMoody County

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