- Laboratories Dental, Oscoda
- Laboratories Medical, Oscoda
- Land Surveyor, Oscoda - Land Surveying Services
- Landscape Contractors & Designers, Oscoda
- Landscaping, Oscoda
- Landscaping Materials & Supplies, Oscoda
- Laundromats & Dry-Cleaning, Coin-Operated, Oscoda
- Laundry Self Service, Oscoda
- Lawn & Garden Equipment & Supplies, Oscoda
- Lawn & Garden Services, Oscoda
- Lawn & Garden Sprinkler Systems, Oscoda
- Lawn Maintenance Services, Oscoda
- Lawn Mower Repair & Blade Sharpening Service, Oscoda
- Lawn Mowers & Power Equipment, Oscoda
- Lawyers & Attorneys, Oscoda
- Legal Professionals, Oscoda
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- Libraries, Oscoda
- Lighting Fixtures & Equipment, Oscoda
- Liquid Filters, Oscoda
- Liquor Stores, Oscoda
- Live Theaters, Oscoda
- Loans Personal, Oscoda
- Locks, Oscoda
- Locksmiths, Oscoda - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Oscoda
- Lodging, Oscoda
- Lodging Services, Oscoda
- Long Haul Trucking Companies, Oscoda
- Lubricating Oils , Oscoda - Motor Oil
- Lumber Brokers, Oscoda
- Lutheran Church, Oscoda
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