| Business | Phone |
| Mercersburg Boro Office 113 S Main St, Mercersburg 17236 | (717) 328-3116 |
| Mercersburg Boro Sewage Plant 113 S Main St, Mercersburg 17236 | (717) 328-3324 |
| Mercersburg Water Filtration 2831 Stoney Batter Rd, Mercersburg 17236 | (717) 328-9422 |
| Montgomery Supervisors 11364 Fort Loudon Rd, Mercersburg 17236 | (717) 328-3743 |