- Labor & Employment Consultants, Pikesville
- Laboratories Biological, Pikesville
- Laboratories Dental, Pikesville
- Laboratories Medical, Pikesville
- Landscape Contractors & Designers, Pikesville
- Landscaping, Pikesville
- Lawn & Garden Services, Pikesville
- Lawn Maintenance Services, Pikesville
- Lawyers & Attorneys, Pikesville
- Legal & Tax Services, Pikesville
- Legal Professionals, Pikesville
- Life Insurance, Pikesville
- Lighting Fixtures Repair, Maintenance & Installation, Pikesville
- Limousine Service, Pikesville
- Linens, Pikesville
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- Linens & Towels Manufacturers, Pikesville
- Lingerie & Underwear for Women, Pikesville - Bras, Panties, Bustiers, Corsets & More
- Lining Materials, Pikesville
- Liquor Stores, Pikesville
- Live Theaters, Pikesville
- Loans Personal, Pikesville
- Locks, Pikesville
- Locksmiths, Pikesville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Pikesville
- Lodging, Pikesville
- Lodging Services, Pikesville
- Long Haul Trucking Companies, Pikesville
- Lumber & Lumber Products, Pikesville
- Lumber & Lumber Products, Pikesville
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