There are 56 FDIC-insured banks headquartered in South Dakota, holding $3.94T in combined assets and $3.16T in deposits, alongside 33 NCUA-insured credit unions. Every figure below comes from the most recent quarterly call report each institution filed with its regulator. Banks are ranked by total assets, which is the standard measure of institution size and the basis regulators use for peer grouping and for determining which capital rules apply.
Ranked by total assets. Branch counts are domestic offices. Click any institution for eight quarters of financial history, peer benchmarking against similarly sized banks, deposit market share by county, and leadership contacts.
| # | Bank | City | Assets | Deposits | Branches |
|---|---|---|---|---|---|
| 1 | Citibank, National Association | Sioux Falls | $1.98T | $1.55T | 667 |
| 2 | Wells Fargo Bank, National Association | Sioux Falls | $1.91T | $1.56T | 4161 |
| 3 | The Bancorp Bank, National Association | Sioux Falls | $9.21B | $7.49B | 1 |
| 4 | Pathward, National Association | Sioux Falls | $7.31B | $5.95B | 1 |
| 5 | Dacotah Bank | Aberdeen | $4.92B | $4.35B | 32 |
| 6 | First Bank & Trust | Brookings | $4.78B | $4.17B | 22 |
| 7 | First PREMIER Bank | Sioux Falls | $3.64B | $2.89B | 13 |
| 8 | First Dakota National Bank | Yankton | $3.39B | $2.96B | 17 |
| 9 | Sunrise Banks, National Association | Sioux Falls | $2.78B | $2.51B | 5 |
| 10 | American Bank & Trust | Sioux Falls | $2.25B | $1.95B | 20 |
| 11 | The First National Bank in Sioux Falls | Sioux Falls | $2.12B | $1.77B | 18 |
| 12 | First National Bank | Fort Pierre | $2.03B | $1.51B | 20 |
| 13 | BankWest, Inc. | Pierre | $1.93B | $1.65B | 22 |
| 14 | First Savings Bank | Beresford | $1.59B | $1.27B | 24 |
| 15 | CorTrust Bank National Association | Mitchell | $1.56B | $1.38B | 37 |
| 16 | 1st Financial Bank USA | Dakota Dunes | $1.40B | $1.09B | 2 |
| 17 | Plains Commerce Bank | Sioux Falls | $1.30B | $1.08B | 8 |
| 18 | Pioneer Bank & Trust | Belle Fourche | $1.01B | $896.5M | 7 |
| 19 | Reliabank Dakota | Estelline | $788.4M | $663.6M | 10 |
| 20 | First Fidelity Bank | Burke | $717.0M | $648.7M | 11 |
| 21 | Security Savings Bank | Canton | $557.4M | $495.0M | 8 |
| 22 | Black Hills Community Bank, N.A. | Rapid City | $489.7M | $430.4M | 2 |
| 23 | First National Bank | Oldham | $477.8M | $380.1M | 12 |
| 24 | First National Bank in Philip | Philip | $458.4M | $400.6M | 2 |
| 25 | BankStar Financial | Elkton | $363.5M | $302.1M | 3 |
| 26 | Rivers Edge Bank | Marion | $357.1M | $295.9M | 5 |
| 27 | Frontier Bank | Sioux Falls | $349.2M | $323.8M | 5 |
| 28 | Security Bank Midwest | Tyndall | $304.1M | $238.8M | 6 |
| 29 | One American Bank | Centerville | $285.2M | $231.5M | 3 |
| 30 | Commercial State Bank, of Wagner | Wagner | $260.4M | $218.8M | 1 |
| 31 | Farmers State Bank | Parkston | $254.8M | $237.4M | 3 |
| 32 | Security National Bank of South Dakota | Dakota Dunes | $251.5M | $194.7M | 3 |
| 33 | Quoin Financial Bank | Miller | $250.7M | $216.5M | 3 |
| 34 | Campbell County Bank, Inc. | Herreid | $240.7M | $195.9M | 4 |
| 35 | Merchants State Bank | Freeman | $219.6M | $180.7M | 4 |
| 36 | Farmers and Merchants State Bank | Plankinton | $180.4M | $137.3M | 2 |
| 37 | Heartland State Bank | Redfield | $154.0M | $135.1M | 4 |
| 38 | Citizens State Bank, of Arlington | Arlington | $153.2M | $134.9M | 3 |
| 39 | Great Plains Bank | Eureka | $150.4M | $120.6M | 3 |
| 40 | First State Bank of Roscoe | Roscoe | $147.5M | $125.8M | 3 |
| 41 | DNB NATIONAL BANK | Clear Lake | $124.1M | $114.3M | 2 |
| 42 | Security State Bank | Alexandria | $103.0M | $95.6M | 3 |
| 43 | Western Dakota Bank | Timber Lake | $85.6M | $77.3M | 2 |
| 44 | Farmers State Bank of Canton | Canton | $81.6M | $68.4M | 1 |
| 45 | State Bank of Eagle Butte | Eagle Butte | $80.3M | $70.9M | 1 |
| 46 | Ipswich State Bank | Ipswich | $74.2M | $62.3M | 1 |
| 47 | Community Bank | Avon | $69.3M | $60.2M | 1 |
| 48 | The Security State Bank | Emery | $64.8M | $52.2M | 2 |
| 49 | First Western Federal Savings Bank | Rapid City | $63.5M | $40.6M | 1 |
| 50 | Sunrise Bank Dakota | Onida | $57.5M | $49.7M | 1 |
| 51 | Bryant State Bank | Bryant | $52.9M | $45.7M | 1 |
| 52 | Richland State Bank | Bruce | $49.6M | $44.7M | 1 |
| 53 | The Farmers State Bank of Turton | Turton | $41.2M | $34.9M | 1 |
| 54 | The Farmers and Merchants State Bank | Scotland | $36.0M | $32.4M | 1 |
| 55 | The First National Bank of Frederick | Frederick | $28.8M | $25.5M | 1 |
| 56 | Andes State Bank | Lake Andes | $28.2M | $24.2M | 1 |
NCUA-insured credit unions headquartered in South Dakota, ranked by total assets, with member counts from 5300 call report filings.
| # | Credit union | City | Assets | Members |
|---|---|---|---|---|
| 1 | BLACK HILLS | Rapid City | $2.32B | 108,769 |
| 2 | DAKOTALAND | Huron | $719.9M | 41,916 |
| 3 | LEVO | Sioux Falls | $507.9M | 37,210 |
| 4 | VOYAGE | Sioux Falls | $273.2M | 19,767 |
| 5 | HIGHMARK | RAPID CITY | $258.9M | 13,687 |
| 6 | SERVICE FIRST | Sioux Falls | $205.8M | 16,598 |
| 7 | BLUESTONE | Sioux Falls | $204.2M | 11,697 |
| 8 | SENTINEL | BOX ELDER | $197.2M | 9,834 |
| 9 | AREA | ABERDEEN | $196.3M | 11,726 |
| 10 | NORTHERN HILLS | STURGIS | $186.7M | 12,288 |
| 11 | ASPEN | Rapid City | $164.5M | 7,810 |
| 12 | EXPLORERS | YANKTON | $108.3M | 9,037 |
| 13 | DAKOTA PLAINS | Lemmon | $85.8M | 4,855 |
| 14 | NORSTAR | Britton | $74.9M | 2,791 |
| 15 | HEALTHCARE PLUS | Aberdeen | $67.6M | 5,106 |
| 16 | FT RANDALL | WAGNER | $44.8M | 3,380 |
| 17 | OAHE | Pierre | $44.3M | 3,598 |
| 18 | DAKOTA STAR | RAPID CITY | $43.3M | 3,002 |
| 19 | M O | Huron | $42.4M | 1,774 |
| 20 | SIOUX VALLEY COOP | Watertown | $41.2M | 3,377 |
| 21 | EAST RIVER | Madison | $40.0M | 3,159 |
| 22 | AVANTI | WATERTOWN | $31.5M | 2,967 |
| 23 | RUSHMORE ELECTRIC | Rapid City | $28.7M | 1,424 |
| 24 | CONSUMER'S | Gregory | $20.4M | 1,600 |
| 25 | LAKOTA | Kyle | $19.2M | 4,197 |
| 26 | HURON AREA EDUCATION | HURON | $18.1M | 859 |
| 27 | COTEAU VALLEY | SISSETON | $17.7M | 2,189 |
| 28 | PALACE CITY | Mitchell | $16.7M | 1,565 |
| 29 | MINUTEMAN | RAPID CITY | $15.6M | 1,177 |
| 30 | DACOTAH | Rapid City | $10.7M | 843 |
| 31 | DAKOTA RAIL LINE | HURON | $5.2M | 493 |
| 32 | SISSETON-WAHPETON | Agency Village | $5.0M | 1,178 |
| 33 | HB TELCO | Huron | $4.8M | 781 |
Deposit market share is measured at the county level from the FDIC Summary of Deposits, an annual branch-level filing as of each June 30. County data shows which institutions actually hold balances in a given market and how concentrated that market is — a question state-level totals cannot answer, because a bank can be small statewide and dominant in its home county.
Vault republishes public FDIC and NCUA filings without modification. Bank figures come from quarterly call reports; credit union figures from NCUA 5300 filings; branch and deposit market share from the FDIC Summary of Deposits. Data is free to access and free to cite, with no login or paywall. The same data is available to AI agents through a public Model Context Protocol server at vaultbot.ai/mcp.