| Business | Phone |
| Town Barn 2391 County Route 23, Williamstown 13493 | (315) 964-2428 |
| Town Offices 2910 County Route 17 # B, Williamstown 13493 | (315) 964-2179 |
| Town Offices Redfield Rd, Williamstown 13493 | (315) 964-2179 |
| Williamstown Historical Center 2877 County Route 17, Williamstown 13493 | (315) 964-2522 |
| Williamstown Town Offices 2877 County Route 17, Williamstown 13493 | (315) 964-2802 |