Rimbor is a fictional planet in the 30th century DC Universe, best known as the home planet for Legion of Super-Heroes member Ultra Boy.
Rimbor has a reputation as a rough, tough planet where crime runs rampant.
For some unexplained reason, most people on Rimbor have names that follow a certain pattern: The first name consists of two letters, and the last name of three. Examples: "Jo Nah" (Ultra Boy), "An Ryd", "Mo Seh", etc. There have been exceptions, however.
In Other Media 
- In the show Legion of Superheroes Rimbor is mentioned in the episode "Legacy" that Timber Wolf is on a solo mission there.
- In the animated series Young Justice, the Justice League are put under mind control by the Light for about a day, during which time six members (Superman, Wonder Woman, Batman, Martian Manhunter, Hawkwoman and John Stewart) are sent to Rimbor to cause wanton destruction for sixteen hours. This leads the rest of the galaxy to consider Earth a potential threat or tool, resulting in numerous aliens arriving during the second season; meanwhile, the six League members willingly travel to Rimbor to stand trial and hopefully clear their names.