Agathangelus is the Latinized form of the Greek name Agathangelos ().

Agathangelus or Agathangelos is the name of:

Agathangelus of Rome (died 312), Christian martyr Agathangelos ( 5th century CE), possibly a pseudonym, the biographer of Gregory the Illuminator Agathangelus of Constantinople (1769–1832), Patriarch of Constantinople Agathangelos, a fictional 13th-century monk to whom prophecies were attributed by Theoklitos Polyeidis (1698–1759) Agathangelos Xirouchakis (1872–1958), Greek Orthodox cleric and historian Agathangelos Tsiripidis (born 1963), Greek boxer