Ágúst or Agust is a given name. Notable people with the name include:
Ágúst Ævar Gunnarsson, founding member of the Icelandic post-rock band Sigur Rós
Ágúst Guðmundsson (born 1947), Icelandic filmmaker
Ágúst Gylfason (born 1971), Icelandic footballer, currently playing for Fjölnir
Ágúst H. Bjarnason (1875–1952), pioneer in teaching psychology in Iceland
Agust Baldursson, Icelandic born director of television commercials
Daníel Ágúst Haraldsson (born 1969), Icelandic singer-songwriter, lead-singer of the bands GusGus and Esja, formerly of the band Ný Dönsk
