- Laboratories Dental, Fort Thomas
- Laboratories Medical, Fort Thomas
- Land Surveyor, Fort Thomas - Land Surveying Services
- Landscape Contractors & Designers, Fort Thomas
- Landscape Lighting, Fort Thomas
- Landscaping, Fort Thomas
- Laser Hair Removal, Fort Thomas
- Late Night Restaurants, Fort Thomas
- Lawn & Garden Equipment & Supplies, Fort Thomas
- Lawyers & Attorneys, Fort Thomas
- Legal Professionals, Fort Thomas
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- Libraries, Fort Thomas
- Life Insurance, Fort Thomas
- Lighting Consultants & Designers, Fort Thomas
- Lions Clubs, Fort Thomas
- Liquor Stores, Fort Thomas
- Loans Personal, Fort Thomas
- Locks, Fort Thomas
- Locksmiths, Fort Thomas - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Fort Thomas
- Long Haul Trucking Companies, Fort Thomas
- Long Term Care Facility, Fort Thomas
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