Every FDIC-insured bank branch in Sac County, Iowa as of June 30, 2025. County land area: 575 square miles, 2.4 branches per 100 sq mi.
| Institution | Branches | Deposits |
|---|---|---|
| Iowa State Bank | 3 | $174.3M |
| First State Bank | 2 | $22.7M |
| United Bank of Iowa | 2 | $99.1M |
| State Bank of Schaller | 1 | $34.0M |
| The Shelby County State Bank | 1 | $14.6M |
| Iowa Trust & Savings Bank | 1 | $45.1M |
| Westside State Bank | 1 | $29.3M |
| The Citizens First National Bank of Storm Lake | 1 | $23.2M |
| Bank Midwest | 1 | $61.6M |
| Farmers State Bank | 1 | $30.6M |