Honorius may refer to:
- Honorius (emperor) (Flavius Augustus Honorius), western Roman emperor 395–423
- Honorius of Canterbury (Saint Honorius), archbishop of Canterbury 627–653
- Honoratus of Amiens (Saint Honorius of Amiens), bishop of Amiens
- Pope Honorius I, Pope 625–638
- Pope Honorius II, Pope 1124–1130
- Pope Honorius III, Pope 1216–1227
- Pope Honorius IV, Pope 1285–1287
- Antipope Honorius II, 1061–1064
- Honorius of Thebes, dates unknown.
- Honorius Augustodunensis (Honorius of Autun), Christian theologian, 12th century
- Honorius of Kent, died after 1210, Archdeacon of Richmond and canonist
- Honorius, a character in the Bartimaeus Trilogy