- Langhorne
- Langhorne Manor
- Lansdale
- Lansdowne
- Lansford
- Laporte
- Larksville
- Latrobe
- Laurel Mountain Park
- Laurel Run
- Laureldale
- Lawnton
- Lawrence Park
- Lawson Heights
- Le Raysville
- Leechburg
- Leesport
- Leetsdale
- Lehighton
- Lemont
- Lemoyne
- Lenape Heights
- Lenhartsville
- Lewis Run
- Lewisberry
- Lewistown
- Light Street
- Ligonier
- Lilly
- Lime Ridge