MPJ

MPJ or mpj may refer to:


 * Michael Porter Jr. (born 1998), American basketball player
 * Michael Pittman Jr. (born 1997), American football player
 * MPJ, the IATA and FAA LID code for Petit Jean Park Airport, Arkansas, United States
 * MPJ, the Indian Railways station code for Madanpur railway station, West Bengal, India
 * MPJ, the NYSE symbol for Mississippi Power, an American investor-owned electric utility
 * mpj, the ISO 639-3 code for Martu Wangka dialect, Western Australia