JCP
- JCPenney
- Japanese Communist Party
- Java Community Process
- Jenny Craig Pavilion
- Jim Crockett Promotions
- Jobcentre Plus
- Joint Combat Pistol
- Jones College Prep High School
- Jordanian Communist Party
- Journal of Chemical Physics
- Journal of Computational Physics
- Journal of Consumer Psychology
- Judicial corporal punishment
- Justice and Construction Party
- Portuguese Communist Youth