Evagrius or Euagrius may refer to:
- People
- Evagrius of Constantinople (fourth century), bishop of Constantinople (circa 370–380)
- Evagrius of Antioch, bishop of Antioch (388-392)
- Evagrius Ponticus (346–399), Christian mystic
- Template:Ill (5th century), author of the Dialogue of Simon and Theophilus
- Evagrius Scholasticus (6th century), historian
- Biology
- Evagrius, a junior synonym of Elasmopoda, a genus of true bugs in the family Coreidae