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
Evagrius Ponticus (), also called Evagrius the Solitary (345–399 AD), was a Christian monk and ascetic from Heraclea, a city on the coast of Bithynia in Asia Minor. One of the most influential theologians in the late fourth-century church, ...
(346–399), Christian mystic
* (5th century), author of the ''
Dialogue of Simon and Theophilus''
*
Evagrius Scholasticus
Evagrius Scholasticus () was a Syrian scholar and intellectual living in the 6th century AD, and an aide to the patriarch Gregory of Antioch. His surviving work, ''Ecclesiastical History'' (), comprises a six-volume collection concerning the Chu ...
(6th century), historian
;Biology:
* ''Evagrius'', a junior synonym of ''
Elasmopoda'', a genus of true bugs in the family Coreidae
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