- Laboratories Medical, Columbiana
- Laboratories Sound Level Testing, Columbiana
- Land Companies, Columbiana
- Landscape Contractors & Designers, Columbiana
- Landscaping, Columbiana
- Landscaping Materials & Supplies, Columbiana
- Lawn & Garden Equipment & Supplies, Columbiana
- Lawn & Garden Services, Columbiana
- Lawn Maintenance Services, Columbiana
- Lawn Mower Repair & Blade Sharpening Service, Columbiana
- Lawn Mowers & Power Equipment, Columbiana
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- Lawyers & Attorneys, Columbiana
- Legal Professionals, Columbiana
- Libraries, Columbiana
- Life Insurance, Columbiana
- Liquor Stores, Columbiana
- Livestock, Columbiana
- Loans Personal, Columbiana
- Lodging, Columbiana
- Log Homes - Log Cabins Builders, Columbiana - Building Contractors
- Long Haul Trucking Companies, Columbiana
- Lutheran Church, Columbiana
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