Banks in Lake County, South Dakota
6 active bank branches operated by 6 institutions, per FDIC records.
Active branches
6
Banks present
6
Deposits (2026)
$497M
Closings since 2020
0
2 openings
Largest banks by deposits in Lake County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| First Bank & Trust | $185M | 37.2% | 1 |
| Wells Fargo | $89M | 17.8% | 1 |
| BankWest, Inc. | $88M | 17.7% | 1 |
| First Interstate Bank | $67M | 13.6% | 1 |
| First PREMIER Bank | $49M | 9.9% | 1 |
| First National Bank | $19M | 3.8% | 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.