| Business | Phone |
| Farmers & Merchants Bank 905 Plaza Dr, St Clair 63077 | (636) 629-1006 |
| Farmers & Merchants Bank 905 Saint Clair Plaza Dr, St Clair 63077 | (636) 629-1903 |
| Heartland Bank 815 N Commercial Ave, St Clair 63077 | (636) 629-3220 |
| Us Bank 900 N Main St, St Clair 63077 | (636) 629-4700 |