| Business | Phone |
| County Of Delaware 101 N Sandusky St, Delaware 43015 | (740) 368-1800 |
| Delaware Cnty Bldg Regulations 50 Channing St, Delaware 43015 | (740) 833-2200 |
| Delaware Cnty Mounted Deputies 236 Pennsylvania Ave, Delaware 43015 | (740) 369-2236 |
| Delaware Cnty Public Defenders 137 N Sandusky St, Delaware 43015 | (740) 833-2780 |
| Delaware County 911 10 Court St, Delaware 43015 | (740) 368-1900 |
| Delaware County 911 Center 10 Court St, Delaware 43015 | (740) 833-2160 |
| Delaware County Brd-Elections 140 N Sandusky St, Delaware 43015 | (740) 833-2080 |
| Delaware County Co-Op Ext 149 N Sandusky St, Delaware 43015 | (740) 833-2030 |
| Delaware County Commissioners 101 N Sandusky St, Delaware 43015 | (740) 833-2100 |
| Delaware County Common Pleas 91 N Sandusky St # 2, Delaware 43015 | (740) 833-2530 |
| Delaware County Coroner 561 W Central Ave, Delaware 43015 | (740) 368-5210 |
| Delaware County Dog Warden 4781 County Home Rd, Delaware 43015 | (740) 368-1915 |
| Delaware County Elections Brd 91 N Sandusky St, Delaware 43015 | (740) 368-1780 |
| Delaware County Emer Med Svc 10 Court St, Delaware 43015 | (740) 833-2190 |
| Delaware County Emer Medical 909 Us Highway 23 N, Delaware 43015 | (740) 368-1906 |
| Delaware County Engineer 50 Channing St, Delaware 43015 | (740) 833-2400 |
| Delaware County Fair Board 236 Pennsylvania Ave, Delaware 43015 | (740) 362-3851 |
| Delaware County Family Matters Delaware 43015 | (740) 368-1732 |
| Delaware County First Steps 39 W Winter St, Delaware 43015 | (740) 368-1765 |
| Delaware County Juvenile Prbtn 88 N Sandusky St, Delaware 43015 | (740) 833-2630 |
| Delaware County Map Dept 140 N Sandusky St, Delaware 43015 | (740) 833-2450 |
| Delaware County Personnel 22 Court St, Delaware 43015 | (740) 368-1710 |
| Delaware County Personnel Dept 10 Court St # 2, Delaware 43015 | (740) 833-2120 |
| Delaware County Probate 88 N Sandusky St, Delaware 43015 | (740) 833-2680 |
| Delaware County Prosecutor 140 N Sandusky St, Delaware 43015 | (740) 833-2690 |
| Delaware County Record Center 50 Channing St, Delaware 43015 | (740) 833-2140 |
| Delaware County Recorder 140 N Sandusky St, Delaware 43015 | (740) 833-2460 |
| Delaware County Regl Planning 109 N Sandusky St, Delaware 43015 | (740) 833-2260 |
| Delaware County Soil & Water 557 Sunbury Rd # A, Delaware 43015 | (740) 368-1921 |
| Delaware County Title Dept 12 Troy Rd # B, Delaware 43015 | (740) 368-1845 |
| Delaware County Veterans Svc 149 N Sandusky St, Delaware 43015 | (740) 368-1770 |
| Delaware Developmental 106 Stover Dr, Delaware 43015 | (740) 368-5800 |
| Delaware Developmental 4981 County Home Rd, Delaware 43015 | (740) 368-5800 |