| Business | Phone |
| City Of Thornton City Dev 9500 Civic Center Dr, Thornton 80229 | (303) 538-7295 |
| Thornton City Clerk's Office 9500 Civic Center Dr, Thornton 80229 | (303) 538-7230 |
| Thornton City Council 9500 Civic Center Dr, Thornton 80229 | (303) 538-7200 |
| Thornton City Potholes 12450 Washington St, Thornton 80241 | (303) 538-7348 |
| Thornton Communication 9500 Civic Center Dr, Thornton 80229 | (303) 538-7238 |
| Thornton Employment Dept 9500 Civic Center Dr, Thornton 80229 | (303) 538-7245 |
| Thornton Engineering & Inspctn 12450 Washington St # 100, Thornton 80241 | (303) 538-7467 |
| Thornton Finance 9500 Civic Center Dr # 2, Thornton 80229 | (303) 538-7235 |
| Thornton Financial Svc Dept 9500 Civic Center Dr, Thornton 80229 | (303) 538-7545 |
| Thornton Purchasing Dept 9500 Civic Center Dr, Thornton 80229 | (303) 538-7328 |
| Thornton Risk Management 9500 Civic Center Dr, Thornton 80229 | (303) 538-7303 |
| Thornton Senior Citizen Ctr 9471 Dorothy Blvd, Thornton 80229 | (303) 538-7320 |
| Thornton Traffic Engineering 9500 Civic Center Dr, Thornton 80229 | (303) 538-7341 |
| Thornton Water Billing 9500 Civic Center Dr, Thornton 80229 | (303) 538-7370 |