| Business | Phone |
| Bank Of America 499 Old Country Rd, Riverhead 11901 | (631) 000-1111 |
| Bank Of New York 7 W Main St, Riverhead 11901 | (631) 369-8500 |
| Chase 300 E Main St, Riverhead 11901 | (631) 369-9667 |
| Citibank 209 W Main St, Riverhead 11901 | (631) 727-7082 |
| North Fork Bank 1080 Route 58, Riverhead 11901 | (631) 369-1333 |
| North Fork Bank 140 E Main St, Riverhead 11901 | (631) 727-6353 |
| Hudson City Savings Bank 1149 Old Country Rd # A2, Riverhead 11901 | (631) 208-0100 |
| Suffolk County National Bank 1201 Ostrander Ave, Riverhead 11901 | (631) 727-6800 |
| Suffolk County National Bank 206 Griffing Ave, Riverhead 11901 | (631) 727-5151 |
| Washington Mutual 655 Old Country Rd, Riverhead 11901 | (631) 727-7700 |