- Labor & Employment Consultants, Cockeysville
- Labor Organizations, Cockeysville
- Laboratories Biological, Cockeysville
- Laboratories Dental, Cockeysville
- Laboratories Medical, Cockeysville
- Landscape Contractors & Designers, Cockeysville
- Landscape Design & Installation, Cockeysville
- Landscape Lighting, Cockeysville
- Landscaping, Cockeysville
- Landscaping Materials & Supplies, Cockeysville
- Laser Printers, Cockeysville - Office Supplies
- Late Night Restaurants, Cockeysville
- Lawn & Garden Equipment & Supplies, Cockeysville
- Lawn & Garden Services, Cockeysville
- Lawn & Garden Sprinkler Systems, Cockeysville
- Lawn Maintenance Services, Cockeysville
- Lawn Mower Repair & Blade Sharpening Service, Cockeysville
- Lawyers & Attorneys, Cockeysville
- Legal & Tax Services, Cockeysville
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- Legal Information & Referral Services, Cockeysville
- Legal Professionals, Cockeysville
- Life Insurance, Cockeysville
- Linens, Cockeysville
- Lingerie & Underwear for Women, Cockeysville - Bras, Panties, Bustiers, Corsets & More
- Liquid Transportation - Non Hazardous, Cockeysville
- Liquor Stores, Cockeysville
- Live Theaters, Cockeysville
- Loans Personal, Cockeysville
- Locks, Cockeysville
- Locksmiths, Cockeysville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Cockeysville
- Lodging, Cockeysville
- Long Haul Trucking Companies, Cockeysville
- Lumber & Lumber Products, Cockeysville
- Lumber & Lumber Products, Cockeysville
- Lumber & Wood Products Manufacturers, Cockeysville
- Lutheran Church, Cockeysville
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