- Mercersburg Academy
- Mercersburg Area Youth
- Mercersburg Boro Office
- Mercersburg Boro Sewage Plant
- Mercersburg Builders' Supply
- Mercersburg Chamber-Commerce
- Mercersburg Elementary School
- Mercersburg Exxon
- Mercersburg Family Chiro Ctr
- Mercersburg Financial Corp
- Mercersburg First Church-God
- Mercersburg Hair Studio
- Mercersburg Inn
- Mercersburg Journal
- Mercersburg Market
- Mercersburg Mennonite Church
- Mercersburg Montgomery Fire Co
- Mercersburg Montgomery Peters
- Mercersburg Police Dept
- Mercersburg Printing
- Mercersburg Property Mgmt
- Mercersburg Sportsman Assn Inc
- Mercersburg Summit Lab
- Mercersburg Veterinary Clinic
- Mercersburg Water Filtration
