- Laboratories Dental, Hellertown
- Laboratories Medical, Hellertown
- Land Use & Zoning Attorneys & Lawyers, Hellertown
- Landscape Contractors & Designers, Hellertown
- Landscape Lighting Contractors, Hellertown
- Landscaping, Hellertown
- Landscaping Materials & Supplies, Hellertown
- Lawn & Garden Equipment & Supplies, Hellertown
- Lawn & Garden Services, Hellertown
- Lawn Maintenance Services, Hellertown
- Lawn Mowers & Power Equipment, Hellertown
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- Lawyers & Attorneys, Hellertown
- Legal & Tax Services, Hellertown
- Legal Professionals, Hellertown
- Libraries, Hellertown
- License Services, Hellertown
- Life Insurance, Hellertown
- Liquor Stores, Hellertown
- Lodging, Hellertown
- Long Haul Trucking Companies, Hellertown
- Lumber Companies, Hellertown - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Hellertown
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