- Labor Organizations, Valley Stream
- Laboratories Dental, Valley Stream
- Laboratories Medical, Valley Stream
- Ladies Ready To Wear, Valley Stream
- Land Surveyor, Valley Stream - Land Surveying Services
- Landscape Contractors & Designers, Valley Stream
- Landscaping, Valley Stream
- Late Night Restaurants, Valley Stream
- Laundry Self Service, Valley Stream
- Lawn & Garden Equipment & Supplies, Valley Stream
- Lawn & Garden Services, Valley Stream
- Lawn & Garden Sprinkler Systems, Valley Stream
- Lawn Maintenance Services, Valley Stream
- Lawyers & Attorneys, Valley Stream
- Leather Goods Stores & Dealers, Valley Stream
- Legal Professionals, Valley Stream
- Legislative Bodies, Valley Stream
- Lending Services, Valley Stream
- Letter Signs, Valley Stream
- Libraries, Valley Stream
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- Licensed Counselors, Valley Stream
- Life Insurance, Valley Stream
- Lighting Fixtures & Equipment, Valley Stream
- Lighting Fixtures Repair, Maintenance & Installation, Valley Stream
- Limousine Service, Valley Stream
- Linens & Towels Manufacturers, Valley Stream
- Lingerie & Underwear for Women, Valley Stream - Bras, Panties, Bustiers, Corsets & More
- Liquor Stores, Valley Stream
- Lithographic Printing, Valley Stream
- Loans Personal, Valley Stream
- Locks, Valley Stream
- Locksmiths, Valley Stream - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Valley Stream
- Lodging, Valley Stream
- Logistics Freight, Valley Stream
- Long Haul Trucking Companies, Valley Stream
- Lubricating Oils , Valley Stream - Motor Oil
- Lumber & Lumber Products, Valley Stream
- Lumber & Lumber Products, Valley Stream
- Lutheran Church, Valley Stream
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