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- Harry Jackson ("The Four of Us Are Dying")
- Sherry Jackson ("The Last Rites of Jeff Myrtlebank")
- Ted Jacques ("The Self-Improvement of Salvadore Ross") (uncredited)
- Roger Jacquet ("An Occurrence at Owl Creek Bridge")
- Dean Jagger ("Static")
- Joyce Jameson ("I Dream of Genie")
- Vivi Janiss ("The Fever") and ("The Man in the Bottle")
- Ann Jillian ("Mute")
- Larry Johns ("The Grave")
- Arch Johnson ("Static" and "Showdown with Rance McGrew")
- Arte Johnson ("The Whole Truth")
- Jason Johnson ("The Monsters Are Due on Maple Street" and "The Lateness of the Hour")
- Jim Johnson ("Where Is Everybody?")
- Kay Cousins Johnson ("The Night of the Meek") (as Kay Cousins)
- Russell Johnson ("Execution" and "Back There")
- Henry Jones ("Mr. Bevis")
- Miranda Jones ("A Hundred Yards Over the Rim")
- Morgan Jones ("Will the Real Martian Please Stand Up?") and ("The Parallel")
- Stan Jones (actor) ("Cavender Is Coming") (uncredited)
- Kevin Jones ("The Changing of the Guard")
- Donald Journeaux ("Judgment Night")
- Debbie Joyce ("Judgment Night") (uncredited)
Read more about this topic: List Of The Twilight Zone (1959 TV Series) Guest Stars