J3, J03, J 3 or J-3 may refer to:

Roads

County Route J3 (California) There are 45 routes assigned to the "J" zone of the California Route Marker Program, which designates county routes in California. The "J" zone includes county highways in Alameda County, California, Alameda, Calaveras County, California, Calav ...

* Malaysia Federal Route J3

Submarines

* Junsen type submarine * HMAS J3, an Australian submarine

Aircraft

* Junkers J 3, a German Junkers aircraft * J-3, a U.S. Navy airship * Ishikawajima-Harima J3, turbojet engine * Piper J-3, a 1938 light aircraft

Other uses

* J3 perturbation, gravitational force caused by an imperfect symmetry north–south of an object being orbited * J3 Operations Directorate, part of the US Joint Chiefs of Staff * GS&WR Class J3, an Irish steam locomotive * JAC J3, a subcompact car produced by JAC Motors * Janko group J3, in mathematics * Eupheme (temporarily designated S/2003 J 3), a satellite of Jupiter * J3 League, Japanese football league * Northwestern Air IATA code * J03: acute tonsillitis ICD-10 code * Triangular cupola, Johnson Solid number 3 * Samsung Galaxy J3, a smartphone by Samsung * J3 battlecruiser, a British military vessel design from 1920s* LNER Class J3, a class of British steam locomotives

Roads

Submarines

Aircraft

Other uses

See also