- Labor Organizations, Gary
- Labor Unions, Gary
- Land Companies, Gary
- Landscape Contractors & Designers, Gary
- Landscaping, Gary
- Laundry Equipment Rental & Leasing, Gary
- Laundry Self Service, Gary
- Law Enforcement Equipment & Supplies, Gary
- Lawn & Garden Equipment & Supplies, Gary
- Lawn & Garden Services, Gary
- Lawn Maintenance Services, Gary
- Lawyers & Attorneys, Gary
- Legal Professionals, Gary
- Lending Services, Gary
- Libraries, Gary
- Life Insurance, Gary
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- Lime & Limestone, Gary
- Limousine Service, Gary
- Liquor & Beer Manufacturers, Gary
- Liquor Stores, Gary
- Live Theaters, Gary
- Loans Personal, Gary
- Locks, Gary
- Locksmiths, Gary - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Gary
- Lodging, Gary
- Logistics Freight, Gary
- Long Haul Trucking Companies, Gary
- Lumber & Lumber Products, Gary
- Lumber & Lumber Products, Gary
- Lutheran Church, Gary
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