- Labor Organizations, Wareham
- Laboratories Dental, Wareham
- Laboratories Medical, Wareham
- Land Surveyor, Wareham - Land Surveying Services
- Landscape Contractors & Designers, Wareham
- Landscape Lighting, Wareham
- Landscaping, Wareham
- Landscaping Materials & Supplies, Wareham
- Laundry Self Service, Wareham
- Lawn & Garden Equipment & Supplies, Wareham
- Lawn Mowers & Power Equipment, Wareham
- Lawyers & Attorneys, Wareham
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- Legal Professionals, Wareham
- Libraries, Wareham
- Licensed Counselors, Wareham
- Liquor Stores, Wareham
- Locks, Wareham
- Locksmiths, Wareham - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Wareham
- Lodging, Wareham
- Log & Lumber Hauling, Wareham
- Long Haul Trucking Companies, Wareham
- Lumber & Lumber Products, Wareham
- Lumber & Lumber Products, Wareham
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