| Business | Phone |
| Barren Auto Mall 1180 Old Country Rd, Riverhead 11901 | (631) 475-8000 |
| Eagle Chevrolet 96 Main Rd, Riverhead 11901 | (631) 727-1100 |
| Eagle Mazda 1330 Old Country Rd, Riverhead 11901 | (631) 727-0700 |
| Raymond Buick Pontiac Gmc Trck 500 Riverleigh Ave, Riverhead 11901 | (631) 727-2271 |
| Riverhead Auto Mall Ltd 1800 Old Country Rd, Riverhead 11901 | (631) 369-0600 |
| Riverhead Bay Motors 1521 Old Country Rd, Riverhead 11901 | (631) 727-4000 |
| Riverhead Dodge Inc 642 W Main St, Riverhead 11901 | (631) 727-1040 |
| Riverhead Ford Lincoln Mercury County Highway 58, Riverhead 11901 | (631) 727-2200 |
| Riverhead Mitsubishi 1419 Route 58, Riverhead 11901 | (631) 369-0500 |
| Riverhead Toyota 1419 Old Country Rd, Riverhead 11901 | (631) 727-7722 |