Arsenius (Latinized form) and Arsenios (Greek form) is a male first name. It is derived from the Greek word arsenikos (ἀρσενικός), meaning "male", "virile".
It may refer to:
Saint Arsenius the Great (c. 350 – 445), also known as Arsenius the Deacon, Arsenius of Scetis and Turah, and Arsenius the Roman
Saint Arsenius of Corfu, first bishop of Corfu, (d. 800 AD or perhaps 959 AD) one of the principal patron saints of Corfu
Patriarch Arsenius of Alexandria, Patriarch of Alexandria from 1000 to 1010
Arsenius Autorianus (died 1273), Patriarch of Constantinople
Arsenius Apostolius (c. 1468 – 1538), Greek scholar and Bishop of Monemvasia
Gualterus Arsenius (? – c. 1580), instrument maker
Arsenius Walsh (1804 – 1869), Irish Catholic missionary in Hawaii
Arsenius Stadnitsky (1862 – 1936), Archbishop and then Metropolitan of Novgorod from 1910 to 1933
