| Business | Phone |
| Ontario Driver & Vehicle Lcsng 455 Grand Ave E #8, Chatham N7L 1X4 | (519) 351-8659 |
| Ontario Civil Filing Office 21 Seventh St, Chatham N7M 4K1 | (519) 352-7740 |
| Ontario Criminal Provincial 21 Seventh St, Chatham N7M 4K1 | (519) 352-9070 |
| Ontario Community & Social Svc 1023 Richmond St, Chatham N7M 5J5 | (519) 352-5040 |
| Ontario Correctional Svc 17 Seventh St, Chatham N7M 4J9 | (519) 352-0150 |
| Ontario Crown Attorney 21 Seventh St, Chatham N7M 4K1 | (519) 352-2141 |
| Ontario Driver Examination 870 Richmond St, Chatham N7M 5J5 | (519) 352-6154 |
| Ontario Land Registry Office 40 William St N, Chatham N7M 4L2 | (519) 352-5520 |
| Ontario Transportation 870 Richmond St, Chatham N7M 5J5 | (519) 354-1400 |
| Chatham-Kent Member-Parliament 111 Heritage Rd, Chatham N7M 5W7 | (519) 351-0510 |