| Business | Phone |
| Delaware Bd-Supervisors Clerk 111 Main St, Delhi 13753 | (607) 746-2603 |
| Delaware County Arc Rsdntl Svc 43 Main St, Delhi 13753 | (607) 746-3700 |
| Delaware County Board-Election Page Ave, Delhi 13753 | (607) 746-2315 |
| Delaware County Board-Sprvsrs 111 Main St, Delhi 13753 | (607) 746-6691 |
| Delaware County Code Enfrcmnt 280 Phoebe Ln, Delhi 13753 | (607) 746-9555 |
| Delaware County Commissioner 3 Court St, Delhi 13753 | (607) 746-6296 |
| Delaware County Data Proc 111 Main St, Delhi 13753 | (607) 746-6983 |
| Delaware County Elec Coop Whse 3 Depot St, Delhi 13753 | (607) 746-2343 |
| Delaware County Employment Office 97 Main St # 4, Delhi 13753 | (607) 746-7477 |
| Delaware County Family Clerk 3 Court St, Delhi 13753 | (607) 746-2298 |
| Delaware County Fire Advisory Delhi 13753 | (607) 746-2000 |
| Delaware County Ind Dev Page Ave, Delhi 13753 | (607) 746-6255 |
| Delaware County Ind Dev Agency 97 Main St, Delhi 13753 | (607) 746-2139 |
| Delaware County Office-Employment 97 Main St # 4, Delhi 13753 | (607) 746-6497 |
| Delaware County Office Bldg 111 Main St, Delhi 13753 | (607) 746-6838 |
| Delaware County Personnel Office 111 Main St, Delhi 13753 | (607) 746-2318 |
| Delaware County Planning Board Page Ave, Delhi 13753 | (607) 746-2944 |
| Delaware County Stop Dwi 280 Phoebe Ln, Delhi 13753 | (607) 746-8400 |
| Delaware County Support Cllctn 111 Main St, Delhi 13753 | (607) 746-6312 |
| Delaware County Supreme & Cnty 3 Court St # 1, Delhi 13753 | (607) 746-2126 |
| Delaware County Veterans Svc 1 Gallant Ave, Delhi 13753 | (607) 746-2334 |
| Delaware County Veterans Svc Page Ave, Delhi 13753 | (607) 746-2334 |