Astaena dichromia is a species of beetle of the family Scarabaeidae. It is found in Costa Rica.
Adults reach a length of about 9 mm. The anterior clypeus and scutellum are dark reddish brown and the pronotum is reddish brown. The posterior clypeus, frons, vertex and elytra are nearly black.
The name of the species is derived from Greek di (meaning two) and chroma (meaning color) and refers to the bicolored dorsum.