- Jackson Center
- Jacksonville
- Jacobs Creek
- Jacobus
- James City
- Jamestown
- Jamison City
- Jeannette
- Jeddo
- Jefferson
- Jenkintown
- Jenners
- Jennerstown
- Jennersville
- Jermyn
- Jerome
- Jersey Mill
- Jersey Shore
- Jerseytown
- Jessup
- Jim Thorpe
- Joanna
- Joffre
- Johnsonburg
- Johnstown
- Jones Mills
- Jonestown
- Julian
- Juniata Terrace