Jadzia Dax
- Full Name: Jadzia Dax
- Pre-Bonding Name: Jadzia Idaris (DS9 Novel: Trill: Unjoined)
- Born: 2341, Trill (DS9: "Dax")
- Species: Trill
- Eighth host of the Dax symbiont
- Gender: Female
- Father: Kela Idaris
- Sister: Ziranne Idaris
- Husband: Worf (2374)
- Married June 8, 2374 (DS9: "You Are Cordially Invited")
- November 2359: Cadet, Starfleet Academy, science track
- September 2363: Ensign, Starfleet
- Earned Premier Distinctions in astrophysics, exoarchaeology, exobiology and zoology (DS9: "Dax")
- 2364: Rejected by Trill Symbiosis Commission for joining by docent Curzon Dax (DS9: "Facets")
- Reapplied later that year, approved (DS9: "Facets")
- First candidate to successfully be approved following an initial rejection (DS9: "Facets")
- Early 2367: Joined with the Dax symbiont (DS9: "Emissary", "Facets")
- May 2369: Lieutenant, chief science officer, Starfleet; Deep Space 9 (DS9: "Emissary")
- Death: December 29, 2374 (DS9: "Tears of the Prophets")