| Business | Phone |
| Animal Control Svc Div 611 N Fountain Green Rd, Bel Air 21015 | (410) 638-3505 |
| Budget & Management Research 220 S Main St # 3, Bel Air 21014 | (410) 638-3129 |
| Computer Support 220 S Main St, Bel Air 21014 | (410) 638-3219 |
| County Council 212 S Bond St, Bel Air 21014 | (410) 879-2000 |
| Electrical Services 220 S Main St, Bel Air 21014 | (410) 638-3363 |
| Equestrian Center 608 N Tollgate Rd, Bel Air 21014 | (410) 638-3405 |
| Harford Cnty Circuit Ct Clerk 20 W Courtland St, Bel Air 21014 | (410) 638-3426 |
| Harford County Adm 220 S Main St, Bel Air 21014 | (410) 638-3210 |
| Harford County Community Svc 220 S Main St, Bel Air 21014 | (410) 638-3389 |
| Harford County Council 212 S Bond St, Bel Air 21014 | (410) 638-3343 |
| Harford County Election Office 18 Office St, Bel Air 21014 | (410) 638-3268 |
| Harford County Executive 220 S Main St # 3, Bel Air 21014 | (410) 638-3350 |
| Harford County Government 45 S Main St, Bel Air 21014 | (410) 638-3213 |
| Harford County Govt & Comm 220 S Main St, Bel Air 21014 | (410) 638-3554 |
| Harford County Govt Relations 220 S Main St, Bel Air 21014 | (410) 638-3354 |
| Harford County Housing Agency 15 N Main St # 106, Bel Air 21014 | (410) 638-3045 |
| Harford County Human Resources 220 S Main St, Bel Air 21014 | (410) 638-3201 |
| Harford County Infant & Tddlrs 100 Thomas Run Rd, Bel Air 21015 | (410) 638-3823 |
| Harford County Inspections 220 S Main St, Bel Air 21014 | (410) 638-3344 |
| Harford County Law Dept 220 S Main St, Bel Air 21014 | (410) 638-3205 |
| Harford County Liquor Control 16 N Main St, Bel Air 21014 | (410) 638-3028 |
| Harford County Media Resources 220 S Main St, Bel Air 21014 | (410) 638-3223 |
| Harford County Procurement 220 S Main St, Bel Air 21014 | (410) 638-3550 |
| Harford County Register-Wills 20 W Courtland St # 304, Bel Air 21014 | (410) 638-3275 |
| Harford County Risk Management 220 S Main St, Bel Air 21014 | (410) 638-3270 |
| Liriodendron Mansion 502 W Gordon St, Bel Air 21014 | (410) 838-3942 |
| Mobile Homes-Abandoned Prprty 220 S Main St, Bel Air 21014 | (410) 638-3122 |
| Plumbing Services 220 S Main St, Bel Air 21014 | (410) 638-3215 |
| Specific County Licenses 220 S Main St, Bel Air 21014 | (410) 638-3305 |
| State Licenses 20 W Courtland St, Bel Air 21014 | (410) 638-3248 |