- Laboratories Dental, Tyrone
- Laboratories Medical, Tyrone
- Landscape Contractors & Designers, Tyrone
- Landscaping, Tyrone
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Tyrone
- Lawn & Garden Equipment & Supplies, Tyrone
- Lawn & Garden Services, Tyrone
- Lawn Maintenance Services, Tyrone
- Lawyers & Attorneys, Tyrone
- Legal & Tax Services, Tyrone
- Legal Professionals, Tyrone
- Libraries, Tyrone
- License Services, Tyrone
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- Linen Supply Services, Tyrone
- Liquor Stores, Tyrone
- Livestock, Tyrone
- Livestock Dealers, Tyrone
- Loans Personal, Tyrone
- Lodging, Tyrone
- Long Haul Trucking Companies, Tyrone
- Lumber & Lumber Products, Tyrone
- Lumber & Lumber Products, Tyrone
- Lumber Brokers, Tyrone
- Lumber Companies, Tyrone - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Tyrone
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