| Business | Phone |
| Deep Creek Lake Wastewater 762 Mayhew Inn Rd, Oakland 21550 | (301) 387-6115 |
| Garrett County Commissioners 203 S 4th St # 207, Oakland 21550 | (301) 334-8970 |
| Garrett County Election Board 2008 Maryland Hwy # 1, Oakland 21550 | (301) 334-6895 |
| Garrett County Financial Svc Oakland 21550 | (301) 334-8971 |
| Garrett County Human Resources 203 S 4th St # 208, Oakland 21550 | (301) 334-8975 |
| Garrett County Landfill 3118 Oakland Sang Run Rd, Oakland 21550 | (301) 387-0322 |
| Garrett County Liquor Control 313 E Alder St # 105, Oakland 21550 | (301) 334-1925 |
| Garrett County Planning Comm 203 S 4th St # 210, Oakland 21550 | (301) 334-1920 |
| Garrett County Prtnrshp-Child 12423 Garrett Hwy, Oakland 21550 | (301) 334-1189 |
| Garrett County Register-Wills 313 E Alder St # 103, Oakland 21550 | (301) 334-1999 |
| Garrett County Roads Dept 12778 Garrett Hwy, Oakland 21550 | (301) 334-3988 |
| Garrett County Taxes 203 S 4th St # 107a, Oakland 21550 | (301) 334-1965 |
| Garrett Soil Cnsrvtn District 1916 Maryland Hwy # C, Oakland 21550 | (301) 334-6951 |
| Trout Run Wastewater Plant Norris Welch Rd, Oakland 21550 | (301) 334-2132 |