- Labels & Tags, City of Industry
- Labor & Employment Consultants, City of Industry
- Labor Organizations, City of Industry
- Labor Unions, City of Industry
- Laboratories Dental, City of Industry
- Laboratories Medical, City of Industry
- Lamp Shades, City of Industry
- Lamps & Lamp Shades Retail, City of Industry - Desk, Table & Floor Lamps
- Land Planning Services, City of Industry
- Landscape Contractors & Designers, City of Industry
- Landscaping, City of Industry
- Language Schools, City of Industry
- Late Night Restaurants, City of Industry
- Laundromats & Dry-Cleaning, Coin-Operated, City of Industry
- Laundry & Dry Cleaning Equipment & Supplies, City of Industry - Cleaners & Dryers Sales, Repair, Service & Leasing
- Laundry Self Service, City of Industry
- Lawyers & Attorneys, City of Industry
- Learning Disabilities Information Services, City of Industry
- Legal & Tax Services, City of Industry
- Legal Professionals, City of Industry
- Letter Shop & Addressing Services, City of Industry
- Life Insurance, City of Industry
- Life Support Equipment, City of Industry
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- Lighting Consultants, City of Industry
- Lighting Contractors, City of Industry
- Lighting Fixtures & Equipment, City of Industry
- Lime & Limestone, City of Industry
- Lingerie & Underwear for Women, City of Industry - Bras, Panties, Bustiers, Corsets & More
- Lingerie Manufacturers, City of Industry
- Liquor Stores, City of Industry
- Lithograph Inks Manufacturers, City of Industry
- Lithographic Printing, City of Industry
- Loans Personal, City of Industry
- Local & Short Haul Trucking Companies, City of Industry
- Locksmiths, City of Industry - Residence, Commercial, Safe & Auto Car Locksmith
- Lodging, City of Industry
- Lodging Hostels, City of Industry
- Lodging Services, City of Industry
- Logistics Freight, City of Industry
- Long Haul Trucking Companies, City of Industry
- Lubricating Oils & Greases, City of Industry
- Luggage & Accessories , City of Industry
- Lumber & Lumber Products, City of Industry
- Lumber & Lumber Products, City of Industry
- Lumber & Wood Products Manufacturers, City of Industry
- Lumber Companies, City of Industry - Wholesale, Manufacturers & Suppliers
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