- Labor & Employment Consultants, Troy
- Labor Organizations, Troy
- Laboratories Dental, Troy
- Laboratories Medical, Troy
- Land Surveyor, Troy - Land Surveying Services
- Landscape Contractors & Designers, Troy
- Landscaping, Troy
- Landscaping Materials & Supplies, Troy
- Laser Printers, Troy - Office Supplies
- Late Night Restaurants, Troy
- Lawn & Garden Equipment & Supplies, Troy
- Lawn & Garden Sprinkler Systems, Troy
- Lawn Mowers & Power Equipment, Troy
- Lawyers & Attorneys, Troy
- Legal Professionals, Troy
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- Lending Services, Troy
- Libraries, Troy
- Life Insurance, Troy
- Linens & Towels Manufacturers, Troy
- Loans Personal, Troy
- Locks, Troy
- Locksmiths, Troy - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Troy
- Lodging, Troy
- Lodging Services, Troy
- Long Haul Trucking Companies, Troy
- Lumber & Lumber Products, Troy
- Lumber & Lumber Products, Troy
- Lutheran Church, Troy
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