| Business | Phone |
| Collin County District Courts 210 S Mcdonald St, Plano 75074 | (972) 424-1460 |
| Collin County Commissioners Ct 210 S Mcdonald St, Plano 75074 | (972) 424-1460 |
| Collin County Constable Prcnct 920 E Park Blvd 230, Plano 75074 | (972) 881-3070 |
| Collin County Justice Of Peace 200 S Mcdonald, Plano 75074 | (972) 424-1460 |
| Collin County Justice Of Peace 920 E Park Blvd 220, Plano 75074 | (972) 881-3001 |
| Collin County Juvenile Dtntn 4700 Community, Plano 75074 | (972) 424-1460 |
| Collin County Juvenile Prob 900 E Park Blvd 210, Plano 75074 | (972) 881-3050 |
| Collin County Medical Examiner 700 W Wilmeth Rd # B, Plano 75074 | (972) 424-1460 |
| Collin County Passport Svc 900 E Park Blvd, Plano 75074 | (972) 881-3090 |
| Collin County Purchasing Dept 314 S Chestnut, Plano 75074 | (972) 424-1460 |
| Collin County Vehicle Rgstrtn 1800 Northcrest Dr, Plano 75075 | (972) 881-3010 |
| Collin County Vehicle Rgstrtn 920 E Park Blvd, Plano 75074 | (972) 881-3010 |
| Collin County Veterans Svc 900 E Park Blvd 150, Plano 75074 | (972) 881-3060 |