Tasha Yar
- Full Name: Natasha Yar
- Born: 2337, Turkana IV
- Species: Human
- Gender: Female
- Sister: Ishara Yar
- By October 2363: Lieutenant, deputy chief of security, Starfleet; USS Victory (TNG Novel: The Buried Age)
- December 2363: Lieutenant, chief of security, Starfleet; USS Enterprise (NCC-1701-D) (TNG S1)
- Death: October 26, 2364; Vagra II (TNG: "Skin of Evil")