- Labeling Equipment & Supplies, Louisville
- Labeling Service, Louisville
- Labels & Tags, Louisville
- Labor & Employment Consultants, Louisville
- Labor And Employment Relations Attorneys & Lawyers, Louisville
- Labor And Employment Relations Lawyers & Attorneys, Louisville
- Labor Organizations, Louisville
- Labor Unions, Louisville
- Laboratories Dental, Louisville
- Laboratories Medical, Louisville
- Laboratories Pharmaceutical, Louisville
- Laboratory Equipment Repair & Service, Louisville
- Lacquers Manufacturers, Louisville
- Ladder & Ladder Accessories, Louisville
- Ladies Ready To Wear, Louisville
- Laminating Services, Louisville
- Lamp Shades, Louisville
- Lamps & Lamp Shades Retail, Louisville - Desk, Table & Floor Lamps
- Land Planning Services, Louisville
- Land Surveyor, Louisville - Land Surveying Services
- Landscape Contractors & Designers, Louisville
- Landscape Garden Equipment, Louisville
- Landscape Garden Services, Louisville
- Landscape Gardeners, Louisville
- Landscape Lighting, Louisville
- Landscaping, Louisville
- Landscaping Materials & Supplies, Louisville
- Laser Equipment Repair & Service, Louisville
- Laser Printers, Louisville - Office Supplies
- Late Night Restaurants, Louisville
- Laundromats & Dry-Cleaning, Coin-Operated, Louisville
- Laundry & Dry Cleaning Equipment & Supplies, Louisville - Cleaners & Dryers Sales, Repair, Service & Leasing
- Laundry Equipment Rental & Leasing, Louisville
- Laundry Self Service, Louisville
- Law School, Louisville
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Louisville
- Lawn & Garden Decor & Ornaments, Louisville
- Lawn & Garden Equipment & Supplies, Louisville
- Lawn & Garden Services, Louisville
- Lawn & Garden Sprinkler Systems, Louisville
- Lawn & Tree Service, Louisville
- Lawn & Yard, Louisville
- Lawn Maintenance Services, Louisville
- Lawn Mower Repair & Blade Sharpening Service, Louisville
- Lawn Mowers & Power Equipment, Louisville
- Lawyers & Attorneys, Louisville
- Lead Paint Testing, Detection & Removal, Louisville
- Lead Testing, Detection & Removal - Commercial & Industrial, Louisville - Lead Paint
- Lead Testing, Detection & Removal - Residential, Louisville - Lead Paint
- Leak Detecting Instruments, Louisville
- Leather Findings & Finishes, Louisville
- Leather Goods & Luggage Repair, Louisville
- Leather Goods Stores & Dealers, Louisville
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- Legal & Tax Services, Louisville
- Legal Clinics, Louisville
- Legal Consultants Medical, Louisville
- Legal Information & Referral Services, Louisville
- Legal Professionals, Louisville
- Libraries, Louisville
- License Services, Louisville
- Licensed Counselors, Louisville
- Life Insurance, Louisville
- Lighting Consultants, Louisville
- Lighting Contractors, Louisville
- Lighting Fixtures & Equipment, Louisville
- Lighting Fixtures Repair, Maintenance & Installation, Louisville
- Limousine Service, Louisville
- Linen Supply Services, Louisville
- Linens, Louisville
- Lingerie & Underwear for Women, Louisville - Bras, Panties, Bustiers, Corsets & More
- Lions Clubs, Louisville
- Liquid & Bulk Storage, Louisville
- Liquid Filters, Louisville
- Liquid Waste Treatment, Louisville
- Liquor & Beer Manufacturers, Louisville
- Liquor Stores, Louisville
- Lithograph Inks Manufacturers, Louisville
- Lithographic Printing, Louisville
- Litigation / Trial Attorneys & Lawyers, Louisville
- Live Theaters, Louisville
- Livestock, Louisville
- Livestock Dealers, Louisville
- Livestock Equipment & Supplies, Louisville
- Loading Dock Equipment, Louisville
- Loans Check Cashing, Louisville
- Loans Personal, Louisville
- Loans Title Services, Louisville
- Local & Short Haul Trucking Companies, Louisville
- Locks, Louisville
- Locksmiths, Louisville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Louisville
- Lodging, Louisville
- Lodging Services, Louisville
- Log Homes - Log Cabins Builders, Louisville - Building Contractors
- Logistics Freight, Louisville
- Long Haul Trucking Companies, Louisville
- Long Term Care Facility, Louisville
- Lottery Game Retailers, Louisville
- Lubricating Oils , Louisville - Motor Oil
- Luggage & Accessories , Louisville
- Luggage Carriers, Louisville
- Lumber & Lumber Products, Louisville
- Lumber & Lumber Products, Louisville
- Lumber & Wood Products Manufacturers, Louisville
- Lumber Companies, Louisville - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Louisville
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