- Landscape Contractors & Designers, South Lyon
- Landscaping, South Lyon
- Landscaping Materials & Supplies, South Lyon
- Laundromats & Dry-Cleaning, Coin-Operated, South Lyon
- Laundry Self Service, South Lyon
- Lawn & Garden Equipment & Supplies, South Lyon
- Lawn & Garden Services, South Lyon
- Lawn Maintenance Services, South Lyon
- Lawn Mower Repair & Blade Sharpening Service, South Lyon
- Lawn Mowers & Power Equipment, South Lyon
- Lawn Spraying & Treatment, South Lyon
- Lawyers & Attorneys, South Lyon
- Lead Inspection, Testing & Consulting, South Lyon - Lead Paint
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- Legal Professionals, South Lyon
- Libraries, South Lyon
- Life Insurance, South Lyon
- Liquor & Beer Manufacturers, South Lyon
- Liquor Stores, South Lyon
- Locks, South Lyon
- Locksmiths, South Lyon - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, South Lyon
- Lodging, South Lyon
- Long Haul Trucking Companies, South Lyon
- Lottery Game Retailers, South Lyon
- Lutheran Church, South Lyon
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