- Laboratories Medical, Brockport
- Landscape Contractors & Designers, Brockport
- Landscaping, Brockport
- Late Night Restaurants, Brockport
- Lawn & Garden Equipment & Supplies, Brockport
- Lawn & Garden Services, Brockport
- Lawn Maintenance Services, Brockport
- Lawn Mowers & Power Equipment, Brockport
- Lawyers & Attorneys, Brockport
- Legal & Tax Services, Brockport
- Legal Professionals, Brockport
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- Libraries, Brockport
- Liquor Stores, Brockport
- Livestock, Brockport
- Loans Personal, Brockport
- Locksmiths, Brockport - Residence, Commercial, Safe & Auto Car Locksmith
- Lodging, Brockport
- Long Haul Trucking Companies, Brockport
- Lumber & Lumber Products, Brockport
- Lumber & Lumber Products, Brockport
- Lutheran Church, Brockport
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