Astraeus is a Greek mythological figure.
Astraeus may also refer to:
Astraeus Airlines Astraeus (beetle), a genus of insects in the family Buprestidae Astraeus (fungus), a genus of fungi in the family Diplocystaceae Astraeus (mythology), other figures in Greek mythology Astraeus (Pythagorean), a writer who is said to be a source of Porphyry of Tyre's Vita Pythagorae.