J2, J.II or J-2 may refer to:
Codes and classifications J2, the IATA airline designator for Azerbaijan Airlines J-2 visa, a nonimmigrant visa issued by the United States for spouses and dependents of J-1 visa exchange visitors ATC code J02, a subgroup of the Anatomical Therapeutic Chemical Classification System Haplogroup J2 (Y-DNA), a Y-DNA haplogroup Janko group J2 in mathematics Jinja2, a Python template engine that uses file extension .j2 , a celestial body's second dynamic form factor , the second invariant of the deviatoric stress tensor
People and organizations j2 Global Communications, a tech company best known for electronic fax services J2 (music channel), a former New Zealand music TV Channel TVB J2, former names of TVB Plus, a digital TV channel of Television Broadcasts Limited J. League Division 2, the second-tier of Japanese professional association football Jefatura de Inteligencia del Estado Mayor Conjunto de las Fuerzas Armadas (J-2), an Argentine intelligence agency J2, the Intelligence Directorate of the United States Joint Chiefs of Staff Director of Military Intelligence, the head of Irish Defence Forces intelligence, sometimes referred to as J2
Vehicles Rocketdyne J-2, a rocket engine used in the Saturn rockets and intended for use on the Space Launch System AEG J.II, a World War I German ground attack aircraft Albatros J.II, a World War I German single-engine, single-seat, biplane ground-attack aircraft Allard J2, any of several postwar American market-designed English cars Auster J-2 Arrow, a 1945 British single-engined two-seat high-wing touring monoplane HMAS J2, an Australian submarine JAC J2, a city car produced by JAC Motors Junkers J 2, a 1916 all-metal German fighter prototype aircraft LB&SCR J2 class, a British LB&SCR locomotive McCulloch J-2, a 1962 small, two-seat autogyro MG J-type, a 2-seat sports car produced by the MG Car company from 1932 to 1934 Morris Commercial J2 small forward-control van produced from 1956 to 1967 Taylor J-2, a 1935 American two-seat light aircraft Mikoyan-Gurevich MiG-15, an aircraft called J-2 in China
Other uses J2, a comicbook character, son of Juggernaut J2 (orca), or Granny (c. 1936–1951 – c. 2016), a killer whale J2 League, Japanese football league County Route J2 (California) S/2003 J 2, the provisional designation of Jupiter LXXIII, a retrograde irregular satellite of Jupiter J2 (roller coaster), or Hell Cat, a roller coaster at Clementon Amusement Park Johnson solid J2, the equilateral pentagonal pyramid Rocketdyne J-2, a cryogenic rocket engine used on Saturn V Moon rocket Samsung Galaxy J2, an Android smartphone Samsung Galaxy J2 Prime, a successor smartphone, also known as the Samsung Galaxy J2 Ace J2, an open-source clone of the Hitachi/Renesas SuperH-2 microcontroller J2 coefficient, representing the oblateness of Earth Nikon 1 J2, mirrorless interchangeable lens camera
See also JII (disambiguation) 2J (disambiguation)