| Business | Phone |
| Tax Assessor & Collector 101 S Fannin St, Rockwall 75087 | (972) 771-6582 |
| Rockwall County Auditor 101 E Rusk St, Rockwall 75087 | (972) 882-0250 |
| Rockwall County Tax Assessor 101 S Fannin St, Rockwall 75087 | (972) 882-0350 |
| Rockwall County Tax Collector 101 S Fannin St, Rockwall 75087 | (972) 722-6582 |
| Rockwall County Treasurer 101 E Rusk St 201, Rockwall 75087 | (972) 882-0290 |