- Labor & Employment Consultants, Arlington
- Labor Organizations, Arlington
- Laboratories Dental, Arlington
- Laboratories Medical, Arlington
- Laminating Machine, Supplies & Equipment, Arlington
- Lamp Shades, Arlington
- Lamps & Lamp Shades Retail, Arlington - Desk, Table & Floor Lamps
- Land Companies, Arlington
- Land Surveyor, Arlington - Land Surveying Services
- Landscape Contractors & Designers, Arlington
- Landscaping, Arlington
- Language Schools, Arlington
- Language Training Aids, Arlington
- Laser Hair Removal, Arlington
- Late Night Restaurants, Arlington
- Latin American Restaurants, Arlington
- Laundry Self Service, Arlington
- Lawn & Garden Equipment & Supplies, Arlington
- Lawn & Garden Services, Arlington
- Lawn Maintenance Services, Arlington
- Lawyers & Attorneys, Arlington
- Leather Apparel Goods Manufacturers, Arlington
- Leather Goods, Arlington
- Leather Goods & Luggage Repair, Arlington
- Leather Goods Cleaners & Dyers, Arlington
- Leather Goods Manufacturers Supplies, Arlington
- Lebanese Restaurants, Arlington
- Legal & Tax Services, Arlington
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- Legal Professionals, Arlington
- Libraries, Arlington
- License Bureaus Motor Vehicles, Arlington
- Licensed Counselors, Arlington
- Life Insurance, Arlington
- Lighting Consultants, Arlington
- Lighting Consultants & Designers, Arlington
- Lighting Contractors, Arlington
- Lighting Fixtures & Equipment, Arlington
- Limousine Service, Arlington
- Linens, Arlington
- Lingerie & Underwear for Women, Arlington - Bras, Panties, Bustiers, Corsets & More
- Liquor Stores, Arlington
- Litigation Support Services, Arlington
- Live Theaters, Arlington
- Living Room Furniture, Arlington
- Loans Personal, Arlington
- Locks, Arlington
- Locksmiths, Arlington - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Arlington
- Lodging, Arlington
- Lodging Services, Arlington
- Long Haul Trucking Companies, Arlington
- Luggage & Accessories , Arlington
- Lumber & Lumber Products, Arlington
- Lumber & Lumber Products, Arlington
- Lutheran Church, Arlington
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