John is a first name, and may refer to the following cast and crew:
- The Original Series
- John Colicos, the actor who portrayed Count Baltar.
- John Dullaghan, the actor who portrayed Doctor Wilker in various episodes.
- John Dykstra, the special effects supervisor of the episodes "Saga of a Star World" and "The Gun on Ice Planet Zero".
- John Fink, the actor who portrayed Doctor Paye in the pilot episode "Saga of a Star World".
- John Ireland Jr., a writer with a "story by" credit for the two parter "Gun on Ice Planet Zero".
- John Williams, the actor who portrayed an unnamed statesman in the two parter, "War of the Gods".
- John Zenda, the actor who portrayed Zed in the episode "Murder on the Rising Star".
- The Re-imagined Series
- John Heard, the actor who portrayed Commander Barry Garner in the episode "The Captain's Hand".
- John Mann, the actor who portrayed Major Jackson Spencer in the Miniseries, as well as Linden in the episode "Black Market".
- John Pyper-Ferguson, the actor who portrayed Captain Cole "Stinger" Taylor in "Pegasus" and "Resurrection Ship, Part I".
John may refer to the characters of:
- John, a Being of Light introduced in the Original Series episode "Experiment in Terra".
- John "Snitch" Burke, a Viper pilot on Galactica in the Re-imagined Series episode "The Passage".
- John Russel Fowler, the deceased father of the Terran Sarah Fowler, from the Original Series episode "Greetings from Earth".
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