- For information dealing with this year in the timeline of the fictional Star Trek universe, see 2011.
- Note: If you followed this link from an article referring to a production occurring after 2 June 2020, the information hasn't been moved here yet – it is still listed at upcoming productions.
- 2 January - Patricia Smith dies.
- 24 January - Richard C. Datin, Jr. dies.
- 25 January - The Star Trek: Typhon Pact novel, Paths of Disharmony by Dayton Ward, is released.
- 5 February - Don Peterman dies.
- 12 February - Kenneth Mars dies.
- 22 February - Pocket ENT mass-market paperback reprint, Beneath the Raptor's Wing, is released.
- 28 February - Jay Crimp dies.
- 2 March - IDW Publishing releases the trade paperback collection of Captain's Log.
- 4 March - Paul Baxley dies.
- 29 March - Pocket TNG novel, Indistinguishable from Magic, by David A. McIntee, is released.
- 6 April - Jerry Finnerman dies.
- 6 April - IDW Publishing releases the trade paperback collection of Khan: Ruling in Hell.
- 17 April - Michael Sarrazin dies.
- 26 April -
- 28 April - William Campbell dies.
- 8 June - IDW Publishing collection, Star Trek Movie Omnibus, is released.
- 11 June - Lightning Bear dies.
- 15 June - Bill Hickey dies.
- 23 June - Fred Steiner dies.
- 28 June -
- 15 July - The 2012 Original Series and Ships of the Line calendars are released.
- 26 July - Pocket TOS novel, Cast No Shadow, by James Swallow, is released.
- 20 August - Reza Badiyi dies.
- 24 August - Jack Hayes
- 30 August - Pocket TOS novel, A Choice of Catastrophes, by Steve Mollmann and Michael Schuster, is released.
- 20 September - Quirk Books board book, The Star Trek Book of Opposites, is released.
- 21 September - Chronicle Books reference book, Obsessed with Star Trek, is released.
- 22 September - Peter E. Berger dies.
- 27 September - Star Trek: Vanguard novel, What Judgments Come, by Dayton Ward and Kevin Dilmore, is released.
- 1 October - Abrams Books reference book, Star Trek Vault: 40 Years From The Archives, by Scott Tipton is released.
- 4 October - Star Trek: Typhon Pact eBook, The Struggle Within, by Christopher L. Bennett is released.
- 5 October - Charles Napier dies.
- 7 October -
- 25 October - Pocket ENT The Romulan War novel, To Brave the Storm, by Michael A. Martin is released.
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