- Laboratories Medical, Washington Court House
- Laminating Services, Washington Court House
- Land Surveyor, Washington Court House - Land Surveying Services
- Landscape Contractors & Designers, Washington Court House
- Landscaping, Washington Court House
- Late Night Restaurants, Washington Court House
- Laundry Self Service, Washington Court House
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Washington Court House
- Lawn & Garden Equipment & Supplies, Washington Court House
- Lawn & Garden Services, Washington Court House
- Lawn Maintenance Services, Washington Court House
- Lawn Mowers & Power Equipment, Washington Court House
- Lawyers & Attorneys, Washington Court House
- Legal Nurse Consultants, Washington Court House
- Legal Professionals, Washington Court House
- Libraries, Washington Court House
- License Bureaus, Washington Court House
- Life Insurance, Washington Court House
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- Livestock, Washington Court House
- Loans Agricultural, Washington Court House
- Loans Personal, Washington Court House
- Local & Short Haul Trucking Companies, Washington Court House
- Locks, Washington Court House
- Locksmiths, Washington Court House - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Washington Court House
- Lodging, Washington Court House
- Lodging Services, Washington Court House
- Long Haul Trucking Companies, Washington Court House
- Lottery Game Retailers, Washington Court House
- Lubricating Oils , Washington Court House - Motor Oil
- Lumber & Lumber Products, Washington Court House
- Lumber & Lumber Products, Washington Court House
- Lumber & Wood Products Manufacturers, Washington Court House
- Lumber Brokers, Washington Court House
- Lumber Companies, Washington Court House - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Washington Court House
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