- Land Surveyor, Martinsville - Land Surveying Services
- Landscape Contractors & Designers, Martinsville
- Landscaping, Martinsville
- Laundromats & Dry-Cleaning, Coin-Operated, Martinsville
- Lawn & Garden Equipment & Supplies, Martinsville
- Lawn & Garden Services, Martinsville
- Lawn Maintenance Services, Martinsville
- Lawn Mower Repair & Blade Sharpening Service, Martinsville
- Lawn Mowers & Power Equipment, Martinsville
- Lawyers & Attorneys, Martinsville
- Legal Professionals, Martinsville
- Libraries, Martinsville
- License Services, Martinsville
- Life Insurance, Martinsville
- Liquid Transportation - Non Hazardous, Martinsville
- Liquor Stores, Martinsville
- Livestock, Martinsville
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- Loans Personal, Martinsville
- Locks, Martinsville
- Locksmiths, Martinsville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Martinsville
- Lodging, Martinsville
- Lodging Services, Martinsville
- Log & Lumber Hauling, Martinsville
- Log Homes - Log Cabins Builders, Martinsville - Building Contractors
- Loggers, Martinsville
- Long Haul Trucking Companies, Martinsville
- Lubricating Oils , Martinsville - Motor Oil
- Lumber & Lumber Products, Martinsville
- Lumber & Lumber Products, Martinsville
- Lumber & Wood Products Manufacturers, Martinsville
- Lumber Brokers, Martinsville
- Lumber Companies, Martinsville - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Martinsville
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