| Airport - Jamestown | 716-484-0204 | |
| Airport - Dunkirk | 716-484-0204 | |
| Board of Elections | 716-753-4580 | |
| CARTS - North County | 716-366-4500 | |
| CARTS - South County | 716-665-6466 | |
| County Attorney | 716-753-4247 | |
| County Clerk | 716-753-4331 | |
| County Executive | 716-753-4211 | |
| County Historian | 716-753-4857 | |
| District Attorney | 716-753-4241 | |
| DSS - Medicaid | 716-661-8812 | |
| DSS - SNAP | 716-661-8215 | |
| DSS - Temporary Assistance-Jamestown | 716-661-8801 | |
| Emergency Services | 716-753-4341 | |
| Finance | 716-753-4223 | |
| Health | 716-753-4312 | |
| Human/Social Services | 716-753-4591 | |
| Human Resources | 716-753-4237 | |
| Information Services | 716-753-4800 | |
| Landfill | 716-661-8422 | |
| Legislature | 716-753-4215 | |
| Media Information Officer | 716-753-4644 | |
| Mental Hygiene - Mayville | 716-753-4104 | |
| Mental Hygiene - Jamestown | 716-661-8330 | |
| Mental Hygiene - Dunkirk | 716-363-3550 | |
| Office for the Aging - Mayville | 716-753-4471 | |
| Office for the Aging - Jamestown | 716-661-8940 | |
| Office for the Aging - Dunkirk | 716-363-3865 | |
| Parks and Trails | 716-661-8417 | |
| Planning and Economic Development | 716-661-8900 | |
| Probation - Jamestown | 716-661-8011 | |
| Probation - Dunkirk | 716-363-3640 | |
| Public Defender | 716-753-4376 | |
| Public Facilities | 716-661-8400 | |
| Real Property Tax | 716-753-4221 | |
| Sheriff | 716-753-2131 | |
| Sewer District - South County | 716-664-9727 | |
| Sewer District - North County | 716-753-7787 | |
| Sewer District - PPD | 716-753-7788 | |
| Veteran Services - Jamestown | 716-661-8255 | |
| Veteran Services - Dunkirk | 716-268-6030 | |
