Astaena villosa is a species of beetle of the family Scarabaeidae. It is found in Costa Rica.
Adults reach a length of about 8 mm. They are dark reddish brown. The head, legs and abdomen are shiny, while the pronotum and elytra are dull. The dorsum is opalescent.
The species name is derived from Latin villosa (meaning shaggy or hairy) and refers to the dorsal setation of this species.