- Laboratories Dental, Severna Park
- Laboratories Medical, Severna Park
- Landlord - Tenant Attorneys & Lawyers, Severna Park
- Landlord - Tenant Lawyers & Attorneys, Severna Park
- Landlord And Tenant Attorneys & Lawyers, Severna Park
- Landscape Contractors & Designers, Severna Park
- Landscaping, Severna Park
- Landscaping Materials & Supplies, Severna Park
- Lawyers & Attorneys, Severna Park
- Leather Goods & Luggage Repair, Severna Park
- Leather Goods Cleaners & Dyers, Severna Park
- Legal & Tax Services, Severna Park
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- Legal Professionals, Severna Park
- Licensed Counselors, Severna Park
- Limousine Service, Severna Park
- Lions Clubs, Severna Park
- Liquor Stores, Severna Park
- Lithographic Printing, Severna Park
- Loans Personal, Severna Park
- Locks, Severna Park
- Locksmiths, Severna Park - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Severna Park
- Long Haul Trucking Companies, Severna Park
- Lutheran Church, Severna Park
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