| Business | Phone |
| Dering Harbor Vlg Maintenance Locust Point Rd, Shelter Island 11964 | (631) 749-0072 |
| Shelter Island Bldg Inspctrs 46 N Ferry Rd, Shelter Island 11964 | (631) 749-0772 |
| Shelter Island Clerks Office 38 N Ferry Rd, Shelter Island 11964 | (631) 749-1166 |
| Shelter Island Landfill 19 Bowditch, Shelter Island 11964 | (631) 749-2033 |
| Shelter Island Supervisor Office 38 N Ferry Rd, Shelter Island 11964 | (631) 749-0015 |
| Shelter Island Town Beach Hse Midway Rd, Shelter Island 11964 | (631) 749-8881 |