Mimas may refer to:
- Mimas (giant), son of Gaia in Greek mythology, one of the Gigantes slain by Hephaistos
- Mimas (Aeneid), a son of Amycus and Theona, who escorted Aeneas to Italy
- Karaburun, a town and district in Turkey, formerly called Mimas in reference to the Giant
- Mimas (moon), in astronomy, a moon of Saturn marked by a giant crater on its surface
- Mimas (genus), a genus of Hawk moths, including the Lime Hawk-moth
- Mimas (data centre), a UK national academic data centre at The University of Manchester
- Mimas (band), a Denmark based Post-Rock band
Pronounced with a final /z/ sound, it may be:
- Mima mounds, the unexplained geological formations found on the Mima Prairie, as well as other locations