- Laboratories Dental, Lindenhurst
- Laboratories Medical, Lindenhurst
- Land Surveyor, Lindenhurst - Land Surveying Services
- Landscape Contractors & Designers, Lindenhurst
- Landscape Garden Services, Lindenhurst
- Landscaping, Lindenhurst
- Late Night Restaurants, Lindenhurst
- Laundry Self Service, Lindenhurst
- Law Enforcement Equipment & Supplies, Lindenhurst
- Lawn & Garden Services, Lindenhurst
- Lawyers & Attorneys, Lindenhurst
- Legal & Tax Services, Lindenhurst
- Legal Professionals, Lindenhurst
- Libraries, Lindenhurst
- Lie Detectors, Lindenhurst
- Lighting Fixtures Repair, Maintenance & Installation, Lindenhurst
- Limousine Service, Lindenhurst
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- Linen Supply Services, Lindenhurst
- Lingerie & Underwear for Women, Lindenhurst - Bras, Panties, Bustiers, Corsets & More
- Liquor Stores, Lindenhurst
- Livestock, Lindenhurst
- Loans Personal, Lindenhurst
- Local & Short Haul Trucking Companies, Lindenhurst
- Locks, Lindenhurst
- Locksmiths, Lindenhurst - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Lindenhurst
- Lodging, Lindenhurst
- Lodging Services, Lindenhurst
- Long Haul Trucking Companies, Lindenhurst
- Lumber & Lumber Products, Lindenhurst
- Lumber & Lumber Products, Lindenhurst
- Lumber Companies, Lindenhurst - Wholesale, Manufacturers & Suppliers
- Luncheonette Restaurants, Lindenhurst
- Lutheran Church, Lindenhurst
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