- Lapidea
- Larchmont
- Larchmont Meadows
- Larchmont Square
- Lawrence Park
- Leedom Estates
- Leiperville
- Lenni
- Lennox Park Mobile Home Park
- Lester
- Lima Estates
- Linvilla
- Little Tinicum Island
- Llanerch
- Llanwellyn
- Locksley
- Locksley Crossing
- Lake City
- Lamont
- Loleta
- Lynchville
- Lakewood
- Langdon
- Lavery
- LeBoeuf Garden
- Little Elk
- Little Hope
- Lovell
- Lowville
- Lundys Lane