- Lincoln Intermediate Unit
- Lincoln Intermediate Unit 12
- Lincoln Penny Candy
- Linthicum Plumbing Inc
- Little Italy Iv
- Little Life Enrichment Ctr
- Little Mexico Taqueria
- Little's 66 Svc Station
- Lloyd's Plumbing & Heating
- Long Plumbing & Heating LLC
- Lori A Dilling
- M & M Electric
- M & S Quality Painting
- M & W General Repair LLC
- M S Warner General Constr
