| Business | Phone |
| Middle Island Garden Apts 1 Bailey Rd, Middle Island 11953 | (631) 924-4613 |
| Eagleview Retirement Community 175 Robin Dr, Middle Island 11953 | (631) 205-1256 |
| Fairfield Village Middle Is 248 Lake Pointe Cir, Middle Island 11953 | (631) 924-1100 |
| Oak Crest 5 Summersweet Dr, Middle Island 11953 | (845) 486-8884 |
| Pinewood Estates 203 Pinewoods Cres, Middle Island 11953 | (631) 736-8515 |
| Stonegate At Middle Island 100 Stonegate Way, Middle Island 11953 | (631) 696-6888 |