- Lace & Wrap Knit Fabric Mills, Mohnton
- Landscape Contractors & Designers, Mohnton
- Landscape Garden Equipment, Mohnton
- Landscape Lighting, Mohnton
- Landscaping, Mohnton
- Landscaping Materials & Supplies, Mohnton
- Lawn & Garden Equipment & Supplies, Mohnton
- Lawn & Garden Services, Mohnton
- Lawn & Garden Sprinkler Systems, Mohnton
- Lawn Maintenance Services, Mohnton
- Lawn Mowers & Power Equipment, Mohnton
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- Legal & Tax Services, Mohnton
- Legal Professionals, Mohnton
- Lighting Fixtures & Equipment, Mohnton
- Limousine Service, Mohnton
- Liquor Stores, Mohnton
- Lodging, Mohnton
- Long Haul Trucking Companies, Mohnton
- Lumber & Lumber Products, Mohnton
- Lumber & Lumber Products, Mohnton
- Lutheran Church, Mohnton
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