- Land Surveyor, Louiseville - Land Surveying Services
- Landscape Contractors & Designers, Louiseville
- Landscaping, Louiseville
- Lawn & Garden Equipment & Supplies, Louiseville
- Lawn & Garden Services, Louiseville
- Lawn Mowers & Power Equipment, Louiseville
- Lawyers & Attorneys, Louiseville
- Legal & Tax Services, Louiseville
- Legal Professionals, Louiseville
- Libraries, Louiseville
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- License Services, Louiseville
- Lingerie & Underwear for Women, Louiseville - Bras, Panties, Bustiers, Corsets & More
- Liquor Stores, Louiseville
- Livestock, Louiseville
- Locks, Louiseville
- Locksmiths, Louiseville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Louiseville
- Lodging, Louiseville
- Long Term Care Facility, Louiseville
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