| Business | Phone |
| Cornwall Building Inspector 183 Main St, Cornwall 12518 | (845) 534-9429 |
| Cornwall Dog Control 183 Main St, Cornwall 12518 | (845) 534-3301 |
| Cornwall Receiver Of Taxes 183 Main St, Cornwall 12518 | (845) 534-4388 |
| Cornwall Sewage Treatment Plnt 183 Main St, Cornwall 12518 | (845) 534-7994 |
| Cornwall Supervisors Office 183 Main St, Cornwall 12518 | (845) 534-3760 |
| Cornwall Town Ambulance Dist Clinton, Cornwall 12518 | (845) 534-5832 |
| Cornwall Volunteer Ambulance 1 Clinton St, Cornwall 12518 | (845) 534-9510 |
| Sixty-Plus Nutrition Program 183 Main St, Cornwall 12518 | (845) 534-4500 |