Villains who are not deceased but are no longer active (at least physically) due to being imprisoned or incarcerated, whether it be by regular means (in the case of more human beings) or mystical means (in the case of more demonic/god-like beings). Although they are unable to be a physical threat, imprisoned villains may be able to continue their crimes from prison and often plot ways to escape.

However, imprisoned villains can still have redeemable traits after briefly helping the heroes to defeat the main villain who were using them, but still get captured for the actions they have done (e.g. Miss Sharon Stone and Mr. Freeze).

Note: Imprisoned villains cannot be labeled as Karma Houdinis regardless of how painless the imprisonment is, the one exception is villains who are former inmates that successfully manage to escape without being brought to justice or given any punishment whatsoever.

ALSO, villains who have previously been imprisoned but were released (e.g. Dee Dee Twins and Ventriloquist) or managed to escape and continue their villainy (e.g. Tai Lung, Ivan Ooze, Joan Ferguson, Miles Jackson, Ryan Gaerity and Moro) DO NOT qualify. This category is for villains who are still imprisoned as of their most recent appearance in continuity.