| Business | Phone |
| Southold Building Dept 53095 Route 25, Southold 11971 | (631) 765-1802 |
| Southold Supervisor 53095 Route 25, Southold 11971 | (631) 765-1800 |
| Southold Supervisor Main Rd, Southold 11971 | (631) 477-1889 |
| Southold Town Appeals Board 53095 Route 25, Southold 11971 | (631) 765-1809 |
| Southold Town Appeals Board Main Rd, Southold 11971 | (631) 765-1809 |
| Southold Town Office 53095 Main Rd, Southold 11971 | (631) 765-1800 |
| Southold Town Planning Board 53095 Route 25, Southold 11971 | (631) 765-1938 |
| Southold Town Planning Board 54375 Main Rd, Southold 11971 | (631) 765-1938 |
| Southold Town Supervisor 53095 Route 25, Southold 11971 | (631) 765-1889 |
| Southold Town Supervisor Main Rd, Southold 11971 | (631) 765-1889 |