- Laboratories Medical, Washington
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Washington
- Lawn & Garden Equipment & Supplies, Washington
- Lawn & Garden Services, Washington
- Lawn Maintenance Services, Washington
- Lawn Mowers & Power Equipment, Washington
- Lawyers & Attorneys, Washington
- Legal Professionals, Washington
- Life Insurance, Washington
- Lighting Consultants & Designers, Washington
- Lighting Fixtures & Equipment, Washington
- Liquor Stores, Washington
- Livestock, Washington
- Livestock Dealers, Washington
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- Livestock Equipment & Supplies, Washington
- Livestock Producers, Washington
- Loans Personal, Washington
- Locks, Washington
- Locksmiths, Washington - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Washington
- Lodging, Washington
- Long Haul Trucking Companies, Washington
- Lubricating Oils , Washington - Motor Oil
- Lumber & Lumber Products, Washington
- Lumber & Lumber Products, Washington
- Lumber Companies, Washington - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Washington
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