Acontius is a young man in Greek mythology.

Acontius may also refer to:

Abundius the Sacristan (died c. 564), also spelled Acontius, a sacristan of the Church of Saint Peter in Rome Jacopo Aconcio (c. 1520–c. 1566), also known as Jacobus Acontius, Italian jurist, theologian, philosopher and engineer Melchior Acontius (1515–1569), German poet Lucius Ranius Optatus, perhaps surnamed Acontius, ancient Roman official, a member of the Rania gens plebeian family Acontius (spider), a spider genus , a World War II motor torpedo boat tender

See also Acontias (disambiguation)