- Laboratories Medical, Marrero
- Landscape Contractors & Designers, Marrero
- Landscaping, Marrero
- Late Night Restaurants, Marrero
- Laundry & Dry Cleaning Equipment & Supplies, Marrero - Cleaners & Dryers Sales, Repair, Service & Leasing
- Laundry Equipment Rental & Leasing, Marrero
- Lawn & Garden Equipment & Supplies, Marrero
- Lawn & Garden Services, Marrero
- Lawn Maintenance Services, Marrero
- Lawn Mowers & Power Equipment, Marrero
- Lawn Spraying & Treatment, Marrero
- Lawyers & Attorneys, Marrero
- Legal & Tax Services, Marrero
- Legal Professionals, Marrero
- Libraries, Marrero
- Licensed Counselors, Marrero
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- Life Insurance, Marrero
- Lighting Fixtures & Equipment, Marrero
- Lime & Limestone, Marrero
- Limousine Service, Marrero
- Liquid & Bulk Storage, Marrero
- Liquor Stores, Marrero
- Livestock, Marrero
- Loans Check Cashing, Marrero
- Loans Personal, Marrero
- Loans Title Services, Marrero
- Locks, Marrero
- Locksmiths, Marrero - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Marrero
- Lodging, Marrero
- Long Haul Trucking Companies, Marrero
- Lutheran Church, Marrero
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