Mímir is a primal figure of Norse mythology.
Mimir may also refer to:
- Mimir (band)
- Mimir (Planescape), a magical construct in the Dungeons & Dragons Planescape setting
- an alternate name of Regin in Norse mythology
- a character in the 2018 video game God of War
- an open-source Prometheus-compatible time-series database created by Grafana