| Business | Phone |
| Williamson Cnty Justice-Peace 211 Commerce Blvd, Round Rock 78664 | (512) 248-3222 |
| Williamson County Corrections 211 Commerce Blvd, Round Rock 78664 | (512) 248-3232 |
| Williamson County Animal Cntrl 2121 N Mays St, Round Rock 78664 | (512) 388-4615 |
| Williamson County Commissioner 400 W Main Ave, Round Rock 78664 | (512) 733-5380 |
| Williamson County Constable 211 Commerce Blvd, Round Rock 78664 | (512) 248-3239 |
| Williamson County Crisis Ctr 211 Commerce Blvd 103, Round Rock 78664 | (512) 255-1212 |
| Williamson County Ems 203 Commerce Blvd, Round Rock 78664 | (512) 255-0855 |
| Williamson County Mh-Mr Clinic 212 Commerce Blvd, Round Rock 78664 | (512) 255-4489 |