J series may refer to:
Technology Fujifilm FinePix J series, of digital cameras Gibson J series, of musical instruments Juniper J series, of routers Honda J engine Jeep Honcho, pickups Samsung Galaxy J series, a series of phones Sony Ericsson J series, a series of phones TADIL-J, J-series messages in a military data protocol
Other uses QI (J series), a season of the TV quiz show QI
See also J (disambiguation)