- Labor Organizations, Orillia
- Laboratories Medical, Orillia
- Land Surveyor, Orillia - Land Surveying Services
- Landscape Contractors & Designers, Orillia
- Landscaping, Orillia
- Landscaping Materials & Supplies, Orillia
- Laundromats & Dry-Cleaning, Coin-Operated, Orillia
- Laundry & Dry Cleaning Equipment & Supplies, Orillia - Cleaners & Dryers Sales, Repair, Service & Leasing
- Laundry Self Service, Orillia
- Lawn & Garden Equipment & Supplies, Orillia
- Lawn & Garden Services, Orillia
- Lawn & Garden Sprinkler Systems, Orillia
- Lawn Bowling, Orillia
- Lawn Maintenance Services, Orillia
- Lawn Mowers & Power Equipment, Orillia
- Lawyers & Attorneys, Orillia
- Legal & Tax Services, Orillia
- Legal Clinics, Orillia
- Legal Professionals, Orillia
- Libraries, Orillia
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- Life Insurance, Orillia
- Lighting Fixtures & Equipment, Orillia
- Limousine Service, Orillia
- Lingerie & Underwear for Women, Orillia - Bras, Panties, Bustiers, Corsets & More
- Liquor Stores, Orillia
- Live Theaters, Orillia
- Livestock, Orillia
- Loans Personal, Orillia
- Local & Short Haul Trucking Companies, Orillia
- Locks, Orillia
- Locksmiths, Orillia - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Orillia
- Lodging, Orillia
- Lodging Services, Orillia
- Long Haul Trucking Companies, Orillia
- Lottery Game Retailers, Orillia
- Lubricating Oils , Orillia - Motor Oil
- Lumber & Wood Products Manufacturers, Orillia
- Lumber Companies, Orillia - Wholesale, Manufacturers & Suppliers
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