- Laboratories Dental, Sault Sainte Marie
- Laboratories Medical, Sault Sainte Marie
- Land Surveyor, Sault Sainte Marie - Land Surveying Services
- Landscape Contractors & Designers, Sault Sainte Marie
- Landscaping, Sault Sainte Marie
- Landscaping Materials & Supplies, Sault Sainte Marie
- Late Night Restaurants, Sault Sainte Marie
- Lawn & Garden Equipment & Supplies, Sault Sainte Marie
- Lawn & Garden Services, Sault Sainte Marie
- Lawn Hydroseeding, Sault Sainte Marie
- Lawn Maintenance Services, Sault Sainte Marie
- Lawn Mowers & Power Equipment, Sault Sainte Marie
- Lawyers & Attorneys, Sault Sainte Marie
- Legal & Tax Services, Sault Sainte Marie
- Legal Professionals, Sault Sainte Marie
- Libraries, Sault Sainte Marie
- Licensed Counselors, Sault Sainte Marie
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- Life Insurance, Sault Sainte Marie
- Linen Supply Services, Sault Sainte Marie
- Liquor Stores, Sault Sainte Marie
- Litigation Support Services, Sault Sainte Marie
- Live Theaters, Sault Sainte Marie
- Living Word Church, Sault Sainte Marie
- Loans Personal, Sault Sainte Marie
- Locks, Sault Sainte Marie
- Locksmiths, Sault Sainte Marie - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Sault Sainte Marie
- Lodging, Sault Sainte Marie
- Lodging Services, Sault Sainte Marie
- Log & Lumber Hauling, Sault Sainte Marie
- Long Haul Trucking Companies, Sault Sainte Marie
- Lumber & Lumber Products, Sault Sainte Marie
- Lumber & Lumber Products, Sault Sainte Marie
- Lutheran Church, Sault Sainte Marie
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