JX may refer to:
People JX, an early alias of DJ Jake Williams J. X. Williams, a pseudonym used by several different authors during the 1960s for many adult novels
Technology Roland JX-3P, a MIDI capable synthesizer keyboard which debuted in 1983 JX (operating system), a Java operating system IBM JX, a personal computer that based on IBM PCjr, released in Japan, in 1984 Infiniti JX, a midsize, three-row family crossover produced by Infiniti which was later renamed Infiniti QX60.
Other uses Jx or jx, a digraph in the Esperanto x-system orthography Starlux Airlines, a Taiwanese airline (IATA code JX since 2020) Jiangxi, a province of China (Guobiao abbreviation JX)