Who's Who in Star Trek was a two-part comic miniseries during DC Comics' releases of Star Trek: The Original Series comics. This duology was a reference work encyclopedia of Star Trek published in 1987 to celebrate Star Trek's 20th anniversary. The two issues contained information on characters, species, ships and organizations from the original Star Trek series, the Animated Series, DC's own line of comics, a number of novels and the four films which had been released so far.
- Who's Who in Star Trek, Issue 1 (covering, alphabetically A through K)
- Who's Who in Star Trek, Issue 2 (covering, alphabetically M through Z)