- Labeling Service, Baldwinsville
- Labor Organizations, Baldwinsville
- Laboratories Medical, Baldwinsville
- Land Planning Services, Baldwinsville
- Land Surveyor, Baldwinsville - Land Surveying Services
- Landscape Contractors & Designers, Baldwinsville
- Landscaping, Baldwinsville
- Landscaping Materials & Supplies, Baldwinsville
- Laundry Self Service, Baldwinsville
- Lawn & Garden Equipment & Supplies, Baldwinsville
- Lawn & Garden Services, Baldwinsville
- Lawn & Garden Sprinkler Systems, Baldwinsville
- Lawn Maintenance Services, Baldwinsville
- Lawn Mower Repair & Blade Sharpening Service, Baldwinsville
- Lawn Mowers & Power Equipment, Baldwinsville
- Lawyers & Attorneys, Baldwinsville
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- Legal & Tax Services, Baldwinsville
- Legal Professionals, Baldwinsville
- Licensed Counselors, Baldwinsville
- Liquor & Beer Manufacturers, Baldwinsville
- Liquor Stores, Baldwinsville
- Livestock, Baldwinsville
- Locks, Baldwinsville
- Locksmiths, Baldwinsville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Baldwinsville
- Lodging, Baldwinsville
- Lodging Services, Baldwinsville
- Long Haul Trucking Companies, Baldwinsville
- Lumber & Lumber Products, Baldwinsville
- Lumber & Lumber Products, Baldwinsville
- Lutheran Church, Baldwinsville
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