- Lihn Center For Psychology
- Lilly's Cafe
- Linda D Green MD
- Linear Solutions Corp
- Little Learning Ctr
- Lizelle
- Llanerch Country Club
- Llanerch Country Club Tennis
- Llanerch Fuel Co
- Llanerch Hills Chapel
- Llanerch Orthopaedic X-Ray
- Llanerch Presbyterian Pre Schl
- Llanerch Quarry Reclamation
- Loeb Consulting
- Louis B Lipschutz MD
- Louis D Lattanzio
- Lucidonio General Contracting
- Luigi Di Michele
- Luigi Hair Cutting
- M & T Bank
