J series

J series may refer to:
 * Fujifilm FinePix J series
 * Gibson J series
 * Juniper J series
 * Honda J engine
 * Jeep Honcho
 * QI (J series), the tenth season of the TV quiz show QI
 * Samsung Galaxy J series, a series of cell phones
 * Sony Ericsson J series, a series of cell phones
 * TADIL-J, J-series messages in a military data protocol