- Laboratories Dental, Colville
- Laboratories Medical, Colville
- Land Surveyor, Colville - Land Surveying Services
- Landscape Contractors & Designers, Colville
- Landscaping, Colville
- Laundry & Dry Cleaning Equipment & Supplies, Colville - Cleaners & Dryers Sales, Repair, Service & Leasing
- Laundry Equipment Rental & Leasing, Colville
- Laundry Self Service, Colville
- Lawn & Garden Equipment & Supplies, Colville
- Lawn Mower Repair & Blade Sharpening Service, Colville
- Lawyers & Attorneys, Colville
- Legal & Tax Services, Colville
- Legal Professionals, Colville
- Libraries, Colville
- License Services, Colville
- Life Insurance, Colville
- Lighting Fixtures Repair, Maintenance & Installation, Colville
- Liquor & Beer Manufacturers, Colville
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- Livestock, Colville
- Livestock Feeding Service, Colville
- Loans Personal, Colville
- Locks, Colville
- Locksmiths, Colville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Colville
- Lodging, Colville
- Log & Lumber Hauling, Colville
- Log Homes - Log Cabins Builders, Colville - Building Contractors
- Logging Contractors & Supplies, Colville
- Long Haul Trucking Companies, Colville
- Lumber & Lumber Products, Colville
- Lumber & Lumber Products, Colville
- Lumber & Wood Products Manufacturers, Colville
- Lumber Brokers, Colville
- Lumber Companies, Colville - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Colville
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