- Land Companies, Prairieville
- Landscape Contractors & Designers, Prairieville
- Landscaping, Prairieville
- Late Night Restaurants, Prairieville
- Lawn & Garden Services, Prairieville
- Lawn Maintenance Services, Prairieville
- Lawn Mower Repair & Blade Sharpening Service, Prairieville
- Lawyers & Attorneys, Prairieville
- Lead Testing, Detection & Removal - Commercial & Industrial, Prairieville - Lead Paint
- Lead Testing, Detection & Removal - Residential, Prairieville - Lead Paint
- Legal & Tax Services, Prairieville
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- Legal Professionals, Prairieville
- Libraries, Prairieville
- Lighting Fixtures & Equipment, Prairieville
- Liquor Stores, Prairieville
- Livestock, Prairieville
- Loans Personal, Prairieville
- Lodging, Prairieville
- Logistics Freight, Prairieville
- Long Haul Trucking Companies, Prairieville
- Lumber & Lumber Products, Prairieville
- Lumber & Lumber Products, Prairieville
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