- Labor Organizations, Gardendale
- Laboratories Medical, Gardendale
- Land Surveyor, Gardendale - Land Surveying Services
- Landscape Contractors & Designers, Gardendale
- Landscaping, Gardendale
- Lawn & Garden Equipment & Supplies, Gardendale
- Lawn & Garden Services, Gardendale
- Lawn Maintenance Services, Gardendale
- Lawn Mowers & Power Equipment, Gardendale
- Lawyers & Attorneys, Gardendale
- Legal & Tax Services, Gardendale
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- Legal Professionals, Gardendale
- Life Insurance, Gardendale
- Linens, Gardendale
- Loans Personal, Gardendale
- Loans Title Services, Gardendale
- Locks, Gardendale
- Locksmiths, Gardendale - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Gardendale
- Lodging, Gardendale
- Long Haul Trucking Companies, Gardendale
- Lutheran Church, Gardendale
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