- Laboratories Dental, Katy
- Laboratories Medical, Katy
- Ladies Ready To Wear, Katy
- Lake Management Services, Katy
- Laminating Services, Katy
- Land Companies, Katy
- Land Planning Services, Katy
- Land Surveyor, Katy - Land Surveying Services
- Landscape Contractors & Designers, Katy
- Landscape Lighting, Katy
- Landscaping, Katy
- Landscaping Materials & Supplies, Katy
- Laser Hair Removal, Katy
- Late Night Restaurants, Katy
- Laundromats & Dry-Cleaning, Coin-Operated, Katy
- Laundry Self Service, Katy
- Lawn & Garden Equipment & Supplies, Katy
- Lawn & Garden Services, Katy
- Lawn & Garden Sprinkler Systems, Katy
- Lawn & Garden Supplies & Equipment, Katy
- Lawn Maintenance Services, Katy
- Lawn Mowers & Power Equipment, Katy
- Lawyers & Attorneys, Katy
- Leather Goods Stores & Dealers, Katy
- Legal & Tax Services, Katy
- Legal Clinics, Katy
- Legal Professionals, Katy
- Libraries, Katy
- Licensed Counselors, Katy
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- Life Insurance, Katy
- Lighting Fixtures & Equipment, Katy
- Lighting Fixtures Repair, Maintenance & Installation, Katy
- Limousine Service, Katy
- Linen Supply Services, Katy
- Linens, Katy
- Linens & Towels Manufacturers, Katy
- Lingerie & Underwear for Women, Katy - Bras, Panties, Bustiers, Corsets & More
- Liquor Stores, Katy
- Livestock, Katy
- Livestock Dealers, Katy
- Livestock Equipment & Supplies, Katy
- Livestock Feeders, Katy
- Loans Check Cashing, Katy
- Loans Personal, Katy
- Loans Title Services, Katy
- Local & Short Haul Trucking Companies, Katy
- Locks, Katy
- Locksmiths, Katy - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Katy
- Lodging, Katy
- Lodging Services, Katy
- Logistics Freight, Katy
- Long Haul Trucking Companies, Katy
- Lp Gas Equipment & Supplies, Katy
- Luggage & Accessories , Katy
- Lumber & Lumber Products, Katy
- Lumber & Lumber Products, Katy
- Lutheran Church, Katy
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