Eleuter may refer to:
- Jerzy Eleuter Szymonowicz Siemiginowski (1660–1711), aka Siemiginowski-Eleuter (c. 1660 – c. 1711), a Polish painter and engraver
- Pseudonym of Jarosław Iwaszkiewicz (1894–1980), a Polish writer
See also
- Eleutherius (disambiguation)
- Eleuterio