The Jupiter-8 is an eight-voice polyphonic analog subtractive synthesizer introduced by Roland Corporation in 1981.

The Jupiter-8, or JP-8, was Roland's flagship synthesizer for the first half of the 1980's. Although it lacked the soon-to-be standard of MIDI control, later model Jupiter-8s did include Roland's proprietary DCB interface, and all of them sported advanced features such as "Four on Four" and the ability to split the keyboard into two zones, with a separate patch active on each zone.