- 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 1 April 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.
- 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.