- Labor Organizations, North Tonawanda
- Laboratories Medical, North Tonawanda
- Laboratory Equipment Repair & Service, North Tonawanda
- Lakes & Ponds Construction Maintenance Restoration & Control, North Tonawanda
- Land Surveyor, North Tonawanda - Land Surveying Services
- Landscape Contractors & Designers, North Tonawanda
- Landscaping, North Tonawanda
- Landscaping Materials & Supplies, North Tonawanda
- Laser Equipment Repair & Service, North Tonawanda
- Laundry & Dry Cleaning Equipment & Supplies, North Tonawanda - Cleaners & Dryers Sales, Repair, Service & Leasing
- Laundry Self Service, North Tonawanda
- Lawn & Garden Equipment & Supplies, North Tonawanda
- Lawn Mower Repair & Blade Sharpening Service, North Tonawanda
- Lawn Mowers & Power Equipment, North Tonawanda
- Lawn Mowers Rental & Leasing, North Tonawanda
- Lawyers & Attorneys, North Tonawanda
- Legal Professionals, North Tonawanda
|
- Libraries, North Tonawanda
- Lighting Fixtures & Equipment, North Tonawanda
- Limousine Service, North Tonawanda
- Linens & Towels Manufacturers, North Tonawanda
- Liquor Stores, North Tonawanda
- Live Theaters, North Tonawanda
- Local & Short Haul Trucking Companies, North Tonawanda
- Locks, North Tonawanda
- Locksmiths, North Tonawanda - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, North Tonawanda
- Lodging, North Tonawanda
- Long Haul Trucking Companies, North Tonawanda
- Lumber & Lumber Products, North Tonawanda
- Lumber & Lumber Products, North Tonawanda
- Lumber Companies, North Tonawanda - Wholesale, Manufacturers & Suppliers
- Lutheran Church, North Tonawanda
|