Klag
- Full Name: Klag
- Species: Klingon
- Gender: Male
- Father: M'Raq
- By 2365: Lieutenant, second officer, Klingon Defense Force; IKS Pagh (TNG: "A Matter of Honor")
- By April 2376: Captain, commanding officer, Klingon Defense Force; IKS Gorkon (DS9 Novel: Avatar, Book Two; TNG Novel: A Time to Hate, Q & A)
- Still active as of March 2380 (TNG Novel: Q & A)