- Hair Care Professionals, Mercersburg
- Hardware Stores, Mercersburg
- Health & Medical, Mercersburg
- Health And Medical Centers, Mercersburg
- Health Clubs & Gymnasiums, Mercersburg
- Healthcare Providers, Practitioners & Professionals, Mercersburg
- Heating & Air-Conditioning Contractors, Mercersburg - HVAC Contractors - Installation, Repair, Replace Service, etc
- Heating Contractors, Mercersburg - Heating Systems - Installation & Repair
- Highway & Street Construction Contractors, Mercersburg - Road Construction
- Highway Surfacing & Paving Contractors, Mercersburg - Pavers - Paving Companies
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- Historical Places & Services, Mercersburg
- Holiday & Seasonal Merchandise Stores & Products, Mercersburg
- Holiness Church, Mercersburg
- Home Furnishings, Mercersburg - Home Decor Stores, Items & Accessories
- Hospitals, Mercersburg
- Hot Water Heater Installation & Repair, Mercersburg - Gas & Electric Water Heater Services
- Hotels & Motels, Mercersburg
- Household & Commercial Appliances Stores, Mercersburg
- Hydraulic Equipment Repair & Service, Mercersburg
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