- Lace & Wrap Knit Fabric Mills, Millersville
- Land Surveyor, Millersville - Land Surveying Services
- Landscape Contractors & Designers, Millersville
- Landscaping, Millersville
- Landscaping Materials & Supplies, Millersville
- Laser Printers, Millersville - Office Supplies
- Late Night Restaurants, Millersville
- Lawn & Garden Equipment & Supplies, Millersville
- Lawn & Garden Services, Millersville
- Lawn & Garden Sprinkler Systems, Millersville
- Lawn Maintenance Services, Millersville
- Lawyers & Attorneys, Millersville
- Legal & Tax Services, Millersville
- Legal Professionals, Millersville
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- Licensed Counselors, Millersville
- Life Insurance, Millersville
- Lighting Fixtures Repair, Maintenance & Installation, Millersville
- Limousine Service, Millersville
- Liquor Stores, Millersville
- Loans Personal, Millersville
- Locks, Millersville
- Locksmiths, Millersville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Millersville
- Lodging, Millersville
- Long Haul Trucking Companies, Millersville
- Lumber & Wood Products Manufacturers, Millersville
- Lumber Companies, Millersville - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Millersville
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