| Business | Phone |
| 250 Main Street Realty 250 Main St, Northport 11768 | (631) 261-2900 |
| Mara Brothers Construction 260 Main St, Northport 11768 | (631) 757-6272 |
| Brody O'Connor & O'Connor 7 Bayview Ave, Northport 11768 | (631) 261-7778 |
| Bushell Kleczka Minasi 7 Bayview Ave, Northport 11768 | (631) 261-7777 |
| Buyer's Broker Network 47 Bayberry Rd, Northport 11768 | (631) 754-1177 |
| Century 21 224 Laurel Ave, Northport 11768 | (631) 547-5300 |
| Century 21 300 Main St, Northport 11768 | (631) 754-6400 |
| Coach Real Estate Assocs 66 Gilbert St, Northport 11768 | (631) 757-4000 |
| Coldwell Banker Residential 413 Fort Salonga Rd, Northport 11768 | (631) 754-4800 |
| Daniel Gale Real Estate 408 Fort Salonga Rd, Northport 11768 | (631) 754-3400 |
| Dawn Realty Inc 494 Main St, Northport 11768 | (631) 754-3332 |
| Mustard Seed Real Estate 22 Laurel Ave, Northport 11768 | (631) 757-4420 |
| Distinctive Properties 240 Fort Salonga Rd, Northport 11768 | (631) 261-0300 |
| Du Mola Realty 254 Main St, Northport 11768 | (631) 754-8028 |
| North Bay Realty Corp 842 Fort Salonga Rd, Northport 11768 | (631) 754-8998 |
| Family Realty 300 Main St, Northport 11768 | (631) 266-6262 |
| O'Connor Properties Inc 5 Blueberry Hl, Northport 11768 | (631) 757-0797 |
| Fort Salonga Realty 103 Fort Salonga Rd, Northport 11768 | (631) 754-7355 |
| Gallery Of Homes 224 Laurel Ave, Northport 11768 | (631) 261-6800 |
| Global Properties 39 Doris Ave, Northport 11768 | (631) 757-6666 |
| Pius Realty Ltd 794 Fort Salonga Rd, Northport 11768 | (631) 757-4211 |
| Laurel Avenue Realty 321 Asharoken Ave, Northport 11768 | (631) 757-0137 |