| Business | Phone |
| Newtown Borough Clerk Newtown 6470 | (203) 270-8858 |
| Newtown Borough Warden 1 Main St, Newtown 6470 | (203) 426-9497 |
| Newtown Building Dept 31 Pecks Ln, Newtown 6470 | (203) 270-4260 |
| Newtown Dog Warden/Dog Pound 3 Main St, Newtown 6470 | (203) 426-6900 |
| Newtown Emergency Comms Ctr 3 Main St, Newtown 6470 | (203) 270-4200 |
| Newtown Finance Office 45 Main St, Newtown 6470 | (203) 270-4221 |
| Newtown First Selectman 45 Main St, Newtown 6470 | (203) 270-4201 |
| Newtown Health District 31 Pecks Ln, Newtown 6470 | (203) 270-4291 |
| Newtown Human Resources 45 Main St, Newtown 6470 | (203) 270-4246 |
| Newtown Land Use Dept 4 S Fairfield Cir, Newtown 6470 | (203) 270-4276 |
| Newtown Landfill 45 Main St, Newtown 6470 | (203) 270-4307 |
| Newtown Landfill Ethan Allen Rd, Newtown 6470 | (203) 270-4307 |
| Newtown Registrar Of Voters 45 Main St, Newtown 6470 | (203) 270-4250 |
| Newtown Visiting Nurses 45 Main St, Newtown 6470 | (203) 270-4377 |