JPI

JPI may refer to:
 * Pope John Paul I (1912–1978)
 * Java Platform Interface
 * Jeju Peace Institute, a South Korean think tank
 * Jinnah Polytechnic Institute, in Faisalabad, Punjab, Pakistan
 * Journal of Political Ideologies
 * J.P. Instruments, American avionics manufacturer
 * Juvenile Psychopathic Institute, now the Institute for Juvenile Research at the University of Illinois at Chicago