- Labor Organizations, Port Allen
- Ladder & Lift Equipment & Machine Rental, Port Allen
- Land Surveyor, Port Allen - Land Surveying Services
- Landscaping Materials & Supplies, Port Allen
- Late Night Restaurants, Port Allen
- Laundromats & Dry-Cleaning, Coin-Operated, Port Allen
- Lawn & Garden Equipment & Supplies, Port Allen
- Lawn Mowers & Power Equipment, Port Allen
- Lawyers & Attorneys, Port Allen
- Legal & Tax Services, Port Allen
- Legal Professionals, Port Allen
- Lime & Limestone, Port Allen
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- Limousine Service, Port Allen
- Liquid & Bulk Storage, Port Allen
- Loans Personal, Port Allen
- Lodging, Port Allen
- Lodging Services, Port Allen
- Long Haul Trucking Companies, Port Allen
- Lubricating Oils , Port Allen - Motor Oil
- Lumber & Lumber Products, Port Allen
- Lumber & Lumber Products, Port Allen
- Lumber Brokers, Port Allen
- Lumber Companies, Port Allen - Wholesale, Manufacturers & Suppliers
- Luncheonette Restaurants, Port Allen
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