| Business | Phone |
| Trumbull Finance Dept 5866 Main St, Trumbull 6611 | (203) 452-5010 |
| Trumbull Internal Auditor 5866 Main St, Trumbull 6611 | (203) 452-5064 |
| Trumbull Tax Assessor 5866 Main St, Trumbull 6611 | (203) 452-5016 |
| Trumbull Town Tax Collector 5866 Main St, Trumbull 6611 | (203) 452-5024 |
| Trumbull Town Treasurer 5866 Main St, Trumbull 6611 | (203) 452-5012 |