- Labor & Employment Consultants, Monroeville
- Labor Organizations, Monroeville
- Labor Relations Counselors, Monroeville
- Laboratories Medical, Monroeville
- Ladies Ready To Wear, Monroeville
- Land Companies, Monroeville
- Land Surveyor, Monroeville - Land Surveying Services
- Landscape Contractors & Designers, Monroeville
- Landscaping, Monroeville
- Landscaping Materials & Supplies, Monroeville
- Laundry Self Service, Monroeville
- Lawn & Garden Equipment & Supplies, Monroeville
- Lawn & Garden Services, Monroeville
- Lawn & Tree Service, Monroeville
- Lawn Maintenance Services, Monroeville
- Lawn Mowers & Power Equipment, Monroeville
- Lawyers & Attorneys, Monroeville
- Legal & Tax Services, Monroeville
- Legal Information & Referral Services, Monroeville
- Legal Professionals, Monroeville
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- Letter Shop & Addressing Services, Monroeville
- Letters Of Credit, Monroeville
- Libraries, Monroeville
- Licensed Counselors, Monroeville
- Life Insurance, Monroeville
- Lighting Fixtures & Equipment, Monroeville
- Lighting Fixtures Repair, Maintenance & Installation, Monroeville
- Limousine Service, Monroeville
- Linens, Monroeville
- Lingerie & Underwear for Women, Monroeville - Bras, Panties, Bustiers, Corsets & More
- Liquor Stores, Monroeville
- Loans Personal, Monroeville
- Locks, Monroeville
- Locksmiths, Monroeville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Monroeville
- Lodging, Monroeville
- Lodging Services, Monroeville
- Long Haul Trucking Companies, Monroeville
- Lutheran Church, Monroeville
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