| Business | Phone |
| Visiting Nurse Assn 753 Boston Post Rd # 200, Guilford 6437 | (203) 453-8051 |
| City Engineering Dept 50 Boston St, Guilford 6437 | (203) 453-8029 |
| Shellfishing Information Guilford 6437 | (203) 453-8088 |
| Saferides Office 55r Park St, Guilford 6437 | (203) 453-8070 |
| Guilford Communications Dept 31 Park St, Guilford 6437 | (203) 453-8000 |
| Guilford Community Television Guilford 6437 | (203) 453-8453 |
| Guilford Dockmaster Whitfield St, Guilford 6437 | (203) 453-8092 |
| Guilford Fax Machine 31 Park St, Guilford 6437 | (203) 453-8467 |
| Guilford Finance Office 31 Park St, Guilford 6437 | (203) 453-8026 |
| Guilford Homemaker Home Health 753 Boston Post Rd # 200, Guilford 6437 | (203) 453-8054 |
| Guilford Personnel Director 31 Park St, Guilford 6437 | (203) 453-8020 |
| Guilford Registrar Of Voters 31 Park St, Guilford 6437 | (203) 453-8028 |
| Guilford Selectmen's Office 31 Park St, Guilford 6437 | (203) 453-8015 |
| Guilford Town Dog Warden Sawmill Rd, Guilford 6437 | (203) 453-8083 |
| Guilford Town Finance Board Guilford 6437 | (203) 453-8013 |
| Guilford Transfer Station 1900 Boston Post Rd, Guilford 6437 | (203) 453-8095 |