- Labeling Equipment & Supplies, Mahwah
- Labor & Employment Consultants, Mahwah
- Laboratories Dental, Mahwah
- Laboratories Medical, Mahwah
- Land Surveyor, Mahwah - Land Surveying Services
- Landscape Contractors & Designers, Mahwah
- Landscape Lighting, Mahwah
- Landscaping, Mahwah
- Landscaping Materials & Supplies, Mahwah
- Laundry & Dry Cleaning Equipment & Supplies, Mahwah - Cleaners & Dryers Sales, Repair, Service & Leasing
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Mahwah
- Lawn & Garden Equipment & Supplies, Mahwah
- Lawn & Garden Services, Mahwah
- Lawn Maintenance Services, Mahwah
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- Lawn Mowers & Power Equipment, Mahwah
- Lawyers & Attorneys, Mahwah
- Legal & Tax Services, Mahwah
- Legal Professionals, Mahwah
- Libraries, Mahwah
- Licensed Counselors, Mahwah
- Limousine Service, Mahwah
- Liquor Stores, Mahwah
- Loans Personal, Mahwah
- Locksmiths, Mahwah - Residence, Commercial, Safe & Auto Car Locksmith
- Lodging, Mahwah
- Lodging Services, Mahwah
- Long Haul Trucking Companies, Mahwah
- Lutheran Church, Mahwah
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