| Business | Phone |
| Collin County Engineering 210 S Mcdonald St, Mckinney 75069 | (972) 548-3727 |
| Mc Kinney Animal Control 308 N Tennessee St, Mckinney 75069 | (972) 547-7445 |
| Texas Dept Of Transportation 2205 S State Highway 5, Mckinney 75069 | (972) 542-2345 |
| Collin Cnty Homeland Security Mckinney 75069 | (972) 548-5537 |
| Collin Cnty Telecommunications 210 S Mcdonald St, Mckinney 75069 | (972) 548-4147 |
| Collin County 380th District Mckinney 75069 | (972) 548-4762 |
| Collin County Auditor's Office 200 S Mcdonald St 300, Mckinney 75069 | (972) 548-4641 |
| Collin County Development Svc 825 N Mcdonald St, Mckinney 75069 | (972) 548-5585 |
| Collin County Gis 210 S Mcdonald St, Mckinney 75069 | (972) 548-4192 |
| Texas State Of Paxton Ken 201 W Virginia St, Mckinney 75069 | (972) 562-4543 |