| Business | Phone |
| Gahanna Animal Control Gahanna 43230 | (614) 342-4240 |
| Gahanna Building Inspection 200 S Hamilton Rd, Gahanna 43230 | (614) 342-4010 |
| Gahanna City Development 200 S Hamilton Rd, Gahanna 43230 | (614) 471-5059 |
| Gahanna City Engineer 200 S Hamilton Rd, Gahanna 43230 | (614) 342-4050 |
| Gahanna Clerk Of Council 200 S Hamilton Rd, Gahanna 43230 | (614) 342-4080 |
| Gahanna Clerk Of Council-Plan 200 S Hamilton Rd, Gahanna 43230 | (614) 471-8517 |
| Gahanna Public Svc Dept 200 S Hamilton Rd, Gahanna 43230 | (614) 342-4005 |
| Gahanna Refuse & Recycling 200 S Hamilton Rd, Gahanna 43230 | (614) 342-4440 |
| Gahanna Water Sewer & Refuse 200 S Hamilton Rd, Gahanna 43230 | (614) 471-3827 |
| Mifflin Road Superintendent 218 Agler Rd, Gahanna 43230 | (614) 471-4494 |