- Labels & Tags, Arlington
- Labor & Employment Consultants, Arlington
- Labor Organizations, Arlington
- Labor Unions, Arlington
- Laboratories Dental, Arlington
- Laboratories Medical, Arlington
- Ladies Ready To Wear, Arlington
- Laminating Services, Arlington
- Lamp Repair, Arlington
- Lamp Shades, Arlington
- Lamps & Lamp Shades Retail, Arlington - Desk, Table & Floor Lamps
- Land Development & Planning Engineer, Arlington
- Land Planning Services, Arlington
- Land Surveyor, Arlington - Land Surveying Services
- Landscape Contractors & Designers, Arlington
- Landscape Design & Installation, Arlington
- Landscape Lighting, Arlington
- Landscaping, Arlington
- Landscaping Materials & Supplies, Arlington
- Language Schools, Arlington
- Late Night Restaurants, Arlington
- Latin American Restaurants, Arlington
- Laundromats & Dry-Cleaning, Coin-Operated, Arlington
- Laundry Equipment Rental & Leasing, Arlington
- Laundry Self Service, Arlington
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Arlington
- Lawn & Garden Decor & Ornaments, Arlington
- Lawn & Garden Equipment & Supplies, Arlington
- Lawn & Garden Services, Arlington
- Lawn & Garden Sprinkler Systems, Arlington
- Lawn & Tree Service, Arlington
- Lawn Hydroseeding, Arlington
- Lawn Maintenance Services, Arlington
- Lawn Mower Repair & Blade Sharpening Service, Arlington
- Lawn Mowers & Power Equipment, Arlington
- Lawn Mowers Sharpening Equipment, Arlington
- Lawyers & Attorneys, Arlington
- Lead & Lead Products, Arlington
- Lead Testing, Detection & Removal - Commercial & Industrial, Arlington - Lead Paint
- Lead Testing, Detection & Removal - Residential, Arlington - Lead Paint
- Learning Disabilities Evaluation & Consultation, Arlington
- Leather Goods & Luggage Repair, Arlington
- Leather Goods Cleaners & Dyers, Arlington
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- Leather Goods Stores & Dealers, Arlington
- Lebanese Restaurants, Arlington
- Legal & Tax Services, Arlington
- Legal Information & Referral Services, Arlington
- Legal Information Service, Arlington
- Legal Professionals, Arlington
- Libraries, Arlington
- License Services, Arlington
- Life Insurance, Arlington
- Lifts Auto & Truck, Etc, Arlington
- Lifts Manned, Arlington
- Lighting Consultants, Arlington
- Lighting Contractors, Arlington
- Lighting Fixtures & Equipment, Arlington
- Limousine Service, Arlington
- Linen Supply Services, Arlington
- Linens, Arlington
- Linens & Towels Manufacturers, Arlington
- Lingerie & Underwear for Women, Arlington - Bras, Panties, Bustiers, Corsets & More
- Liquid Air, Arlington
- Liquid Handling Equipment & Systems, Arlington
- Liquid Waste Treatment, Arlington
- Liquor Stores, Arlington
- Lithograph Inks Manufacturers, Arlington
- Livestock, Arlington
- Loans Check Cashing, Arlington
- Loans Personal, Arlington
- Loans Title Services, Arlington
- Locks, Arlington
- Locksmiths, Arlington - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Arlington
- Lodging, Arlington
- Lodging Services, Arlington
- Logistics Freight, Arlington
- Long Haul Trucking Companies, Arlington
- Lp Gas Equipment & Supplies, Arlington
- Lubricating Oils , Arlington - Motor Oil
- Lumber & Lumber Products, Arlington
- Lumber & Lumber Products, Arlington
- Lumber & Wood Products Manufacturers, Arlington
- Lumber Companies, Arlington - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Arlington
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