- Laboratories Dental, Brookville
- Laboratories Medical, Brookville
- Land Surveyor, Brookville - Land Surveying Services
- Landscape Contractors & Designers, Brookville
- Landscaping, Brookville
- Laundry Self Service, Brookville
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Brookville
- Lawn & Garden Equipment & Supplies, Brookville
- Lawn & Garden Services, Brookville
- Lawn Maintenance Services, Brookville
- Lawn Mower Repair & Blade Sharpening Service, Brookville
- Lawn Mowers & Power Equipment, Brookville
- Lawyers & Attorneys, Brookville
- Legal & Tax Services, Brookville
- Legal Professionals, Brookville
- Libraries, Brookville
- License Services, Brookville
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- Life Insurance, Brookville
- Liquor & Beer Manufacturers, Brookville
- Liquor Stores, Brookville
- Loans Personal, Brookville
- Local & Short Haul Trucking Companies, Brookville
- Locks, Brookville
- Locksmiths, Brookville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Brookville
- Locomotives Manufacturers, Brookville
- Lodging, Brookville
- Logging Contractors & Supplies, Brookville
- Logging Equipment & Supplies, Brookville
- Logging Equipment & Supplies Manufacturers, Brookville
- Long Haul Trucking Companies, Brookville
- Lumber Brokers, Brookville
- Lumber Companies, Brookville - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Brookville
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