| Business | Phone |
| Wharfinger Chatham Fish Pier 54 Barcliff Avenue Ext, Chatham 2633 | (508) 945-5177 |
| Town Disposal Area 97 Sam Ryder Rd, Chatham 2633 | (508) 945-5156 |
| Chatham Building Dept 261 George Ryder Rd, Chatham 2633 | (508) 945-5160 |
| Chatham Cemetery Commission 549 Main St, Chatham 2633 | (508) 945-5117 |
| Chatham Coastal Resources 283 George Ryder Rd, Chatham 2633 | (508) 945-5176 |
| Chatham Congregate Housing 3 Captains Lndg, Chatham 2633 | (508) 945-5194 |
| Chatham Harbor Master 613 Stage Harbor Rd, Chatham 2633 | (508) 945-5185 |
| Chatham Laboratory 283 George Ryder Rd, Chatham 2633 | (508) 945-5188 |
| Chatham Permit Dept 283 George Ryder Rd, Chatham 2633 | (508) 945-5180 |
| Chatham Selectman's Office 549 Main St, Chatham 2633 | (508) 945-5107 |
| Chatham Town Accountant 549 Main St, Chatham 2633 | (508) 945-5102 |
| Chatham Town Adm Office 549 Main St, Chatham 2633 | (508) 945-5106 |
| Chatham Town Animal Control 549 Main St, Chatham 2633 | (508) 945-5111 |
| Chatham Town Offices 549 Main St, Chatham 2633 | (508) 945-5100 |
| Chatham Town Shellfish Dept 283 George Ryder Rd, Chatham 2633 | (508) 945-5184 |
| Chatham Visiting Nurses 1250 Main St, Chatham 2633 | (508) 945-2986 |