- Laboratories Dental, Fairmont
- Laboratories Medical, Fairmont
- Land Surveyor, Fairmont - Land Surveying Services
- Landscape Contractors & Designers, Fairmont
- Landscaping, Fairmont
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Fairmont
- Lawn & Garden Equipment & Supplies, Fairmont
- Lawn & Garden Services, Fairmont
- Lawn Maintenance Services, Fairmont
- Lawn Mower Repair & Blade Sharpening Service, Fairmont
- Lawn Mowers & Power Equipment, Fairmont
- Lawyers & Attorneys, Fairmont
- Legal Professionals, Fairmont
- Libraries, Fairmont
- License Services, Fairmont
- Life Insurance, Fairmont
- Liquor Stores, Fairmont
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- Livestock, Fairmont
- Livestock Breeders, Fairmont
- Livestock Dealers, Fairmont
- Livestock Equipment & Supplies, Fairmont
- Livestock Services, Fairmont
- Loans Personal, Fairmont
- Local & Short Haul Trucking Companies, Fairmont
- Locks, Fairmont
- Locksmiths, Fairmont - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Fairmont
- Lodging, Fairmont
- Lodging Hostels, Fairmont
- Lodging Services, Fairmont
- Long Haul Trucking Companies, Fairmont
- Lumber & Lumber Products, Fairmont
- Lumber & Lumber Products, Fairmont
- Lutheran Church, Fairmont
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