- Labor & Employment Consultants, Parkersburg
- Labor Organizations, Parkersburg
- Labor Unions, Parkersburg
- Laboratories Dental, Parkersburg
- Laboratories Medical, Parkersburg
- Ladies Ready To Wear, Parkersburg
- Land Companies, Parkersburg
- Land Surveyor, Parkersburg - Land Surveying Services
- Landscape Contractors & Designers, Parkersburg
- Landscaping, Parkersburg
- Landscaping Materials & Supplies, Parkersburg
- Laser Printers, Parkersburg - Office Supplies
- Late Night Restaurants, Parkersburg
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Parkersburg
- Lawn & Garden Equipment & Supplies, Parkersburg
- Lawn & Garden Services, Parkersburg
- Lawn Maintenance Services, Parkersburg
- Lawn Mower Repair & Blade Sharpening Service, Parkersburg
- Lawn Mowers & Power Equipment, Parkersburg
- Lawyers & Attorneys, Parkersburg
- Lebanese Restaurants, Parkersburg
- Legal Professionals, Parkersburg
- Libraries, Parkersburg
- License Services, Parkersburg
- Licensed Counselors, Parkersburg
- Life Insurance, Parkersburg
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- Lime & Limestone, Parkersburg
- Linen Supply Services, Parkersburg
- Lingerie & Underwear for Women, Parkersburg - Bras, Panties, Bustiers, Corsets & More
- Liquid & Bulk Storage, Parkersburg
- Liquid Filters, Parkersburg
- Liquor Stores, Parkersburg
- Live Theaters, Parkersburg
- Livestock, Parkersburg
- Living Word Church, Parkersburg
- Loading Dock Equipment, Parkersburg
- Loans Personal, Parkersburg
- Local & Short Haul Trucking Companies, Parkersburg
- Locks, Parkersburg
- Locksmiths, Parkersburg - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Parkersburg
- Lodging, Parkersburg
- Log Home Sealing & Refinishing, Parkersburg
- Log Homes - Log Cabins Builders, Parkersburg - Building Contractors
- Long Haul Trucking Companies, Parkersburg
- Lottery Game Retailers, Parkersburg
- Lp Gas Equipment & Supplies, Parkersburg
- Lumber & Lumber Products, Parkersburg
- Lumber & Lumber Products, Parkersburg
- Lumber Brokers, Parkersburg
- Lutheran Church, Parkersburg
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