- Laboratories Medical, Kemptville
- Landscape Contractors & Designers, Kemptville
- Landscaping, Kemptville
- Laundromats & Dry-Cleaning, Coin-Operated, Kemptville
- Lawn & Garden Decor & Ornaments, Kemptville
- Lawn & Garden Equipment & Supplies, Kemptville
- Lawn & Garden Services, Kemptville
- Lawn & Garden Sprinkler Systems, Kemptville
- Lawn Furnishings, Kemptville
- Lawn Ornaments & Decorations, Kemptville
- Lawyers & Attorneys, Kemptville
- Legal & Tax Services, Kemptville
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- Legal Professionals, Kemptville
- Libraries, Kemptville
- Life Insurance, Kemptville
- Liquor Stores, Kemptville
- Livestock, Kemptville
- Livestock Breeders, Kemptville
- Livestock Services, Kemptville
- Livestock Trailers, Kemptville
- Loans Personal, Kemptville
- Lodging, Kemptville
- Long Haul Trucking Companies, Kemptville
- Lubricating Oils , Kemptville - Motor Oil
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