Every FDIC-insured bank branch in Ada County, Idaho as of June 30, 2025. County land area: 1,052 square miles, 10.3 branches per 100 sq mi.
| Institution | Branches | Deposits |
|---|---|---|
| U.S. Bank National Association | 17 | $3.45B |
| Wells Fargo Bank, National Association | 11 | $2.94B |
| First Interstate Bank | 10 | $790.8M |
| JPMorgan Chase Bank, National Association | 10 | $1.14B |
| Glacier Bank | 9 | $527.9M |
| D. L. Evans Bank | 8 | $596.6M |
| KeyBank National Association | 8 | $919.7M |
| Washington Federal Bank | 6 | $487.6M |
| Washington Trust Bank | 4 | $845.5M |
| Zions Bancorporation, N.A. | 4 | $882.7M |
| Banner Bank | 3 | $263.3M |
| BMO Bank National Association | 2 | $79.8M |
| Umpqua Bank | 2 | $91.1M |
| First Federal Savings Bank of Twin Falls | 2 | $149.2M |
| Bank of America, National Association | 2 | $115.9M |
| Idaho First Bank | 2 | $688.3M |
| NBH Bank | 2 | $12.6M |
| Bell Bank | 1 | $0K |
| Sunwest Bank | 1 | $206.3M |
| Heritage Bank | 1 | $19.9M |
| Idaho Trust Bank | 1 | $187.5M |
| Davidson Trust Co. | 1 | $0K |
| Northwest Bank | 1 | $367.3M |