| Business | Phone |
| John J Foley Skilled Nrs Fclty 14 Glover Dr, Yaphank 11980 | (631) 852-4400 |
| Suffolk County Building Mntnc 335 Yaphank Ave # C161, Yaphank 11980 | (631) 852-4287 |
| Suffolk County Buildings Div 335 Yaphank Ave, Yaphank 11980 | (631) 852-4221 |
| Suffolk County Dwi Facility Yaphank Ave, Yaphank 11980 | (631) 852-4750 |
| Suffolk County Elections Board Yaphank Ave, Yaphank 11980 | (631) 852-4500 |
| Suffolk County Farm & Ed Center Yaphank Ave, Yaphank 11980 | (631) 852-4600 |
| Suffolk County Fire Training Yaphank Ave, Yaphank 11980 | (631) 924-6822 |
| Suffolk County Highway Div 335 Yaphank Ave, Yaphank 11980 | (631) 852-4070 |
| Suffolk County Highway Engr 335 Yaphank Ave, Yaphank 11980 | (631) 852-4002 |
| Suffolk County Mosquito Cntrl 335 Yaphank Ave, Yaphank 11980 | (631) 852-4272 |
| Suffolk County Purchasing Div Yaphank Ave, Yaphank 11980 | (631) 852-5211 |