| Business | Phone |
| Berlin Township Trustees 3271 Cheshire Rd, Delaware 43015 | (740) 548-6350 |
| Brown Twp Office 5055 State Route 521, Delaware 43015 | (740) 524-5725 |
| City Of Delaware 1 S Sandusky St, Delaware 43015 | (740) 363-1965 |
| Community Relations Office 70 N Union St, Delaware 43015 | (740) 368-1608 |
| Concord Township Trustees 7250 Dublin Rd, Delaware 43015 | (740) 881-5624 |
| Delaware City Civil/Small Clms 70 N Union St, Delaware 43015 | (740) 368-1550 |
| Delaware City Manager's Office 1 S Sandusky St, Delaware 43015 | (740) 368-1640 |
| Delaware City Prosecutor Office 70 N Union St, Delaware 43015 | (740) 368-1545 |
| Delaware Engineering Dept 20 E William St, Delaware 43015 | (740) 369-2709 |
| Delaware Judge's Office 70 N Union St, Delaware 43015 | (740) 368-1575 |
| Delaware Water Reclamation Center 225 Cherry St, Delaware 43015 | (740) 368-1506 |
| Troy Twp Trustees 4293 Us Highway 23 N, Delaware 43015 | (740) 369-8105 |