| Business | Phone |
| Marcum & Kliegman 400 W Main St, Riverhead 11901 | (631) 208-1600 |
| Markowitz Fenelon & Bank 608 Northville Tpke, Riverhead 11901 | (631) 727-3626 |
| Robert Ferretti Cpa 868 E Main St, Riverhead 11901 | (631) 727-9318 |
| Kandell Farnworth Pubins 121 Union Ave, Riverhead 11901 | (631) 722-5300 |
| Alfred D Richards Cpa 508 Main Rd, Riverhead 11901 | (631) 722-4411 |
| Riverhead Financial Svc 8 E Main St, Riverhead 11901 | (631) 727-3350 |