Every FDIC-insured bank branch in Sauk County, Wisconsin as of June 30, 2025. County land area: 832 square miles, 3.0 branches per 100 sq mi.
| Institution | Branches | Deposits |
|---|---|---|
| Baraboo State Bank | 6 | $408.6M |
| BMO Bank National Association | 4 | $341.8M |
| Community First Bank | 2 | $107.9M |
| Royal Bank | 2 | $62.0M |
| Bank of Prairie du Sac | 2 | $551.9M |
| The Peoples Community Bank | 2 | $125.1M |
| Bank of Mauston | 1 | $30.4M |
| Farmers and Merchants Union Bank | 1 | $21.6M |
| Lake Ridge Bank | 1 | $44.0M |
| Bank of Wisconsin Dells | 1 | $193.7M |
| Prevail Bank | 1 | $97.9M |
| Wells Fargo Bank, National Association | 1 | $98.3M |
| Associated Bank, National Association | 1 | $94.4M |