| Business | Phone |
| Bank Of New York 90 Main St, Sayville 11782 | (631) 589-7200 |
| North Fork Bank 150 N Main St, Sayville 11782 | (631) 567-5702 |
| North Fork Bank 160 Main St, Sayville 11782 | (631) 589-5900 |
| Suffolk County National Bank 161 N Main St, Sayville 11782 | (631) 218-1600 |
| Washington Mutual 131 Main St, Sayville 11782 | (631) 589-0701 |