- Labels & Tags, Addison
- Labor & Employment Consultants, Addison
- Laboratories Dental, Addison
- Laboratories Medical, Addison
- Laboratories Sound Level Testing, Addison
- Laboratory Equipment Repair & Service, Addison
- Land Companies, Addison
- Landscape Contractors & Designers, Addison
- Landscaping, Addison
- Laser Equipment Repair & Service, Addison
- Latin American Restaurants, Addison
- Laundry & Dry Cleaning Equipment & Supplies, Addison - Cleaners & Dryers Sales, Repair, Service & Leasing
- Lawn & Garden Equipment & Supplies, Addison
- Lawn Mowers & Power Equipment, Addison
- Lawyers & Attorneys, Addison
- Lead Testing, Detection & Removal - Commercial & Industrial, Addison - Lead Paint
- Lead Testing, Detection & Removal - Residential, Addison - Lead Paint
- Legal & Tax Services, Addison
- Legal Professionals, Addison
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- Life Insurance, Addison
- Lighting Consultants & Designers, Addison
- Lighting Fixtures & Equipment, Addison
- Limousine Service, Addison
- Liquor Stores, Addison
- Lithographic Printing, Addison
- Loans Personal, Addison
- Locks, Addison
- Locksmiths, Addison - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Addison
- Lodging, Addison
- Lodging Services, Addison
- Logistics Freight, Addison
- Long Haul Trucking Companies, Addison
- Lumber & Lumber Products, Addison
- Lumber & Lumber Products, Addison
- Lumber & Wood Products Manufacturers, Addison
- Lumber Companies, Addison - Wholesale, Manufacturers & Suppliers
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