Neoserica paradoxa is a species of beetle of the family Scarabaeidae. It is found in Vietnam.
Adults reach a length of about 7 mm. They have a reddish brown, oval body, the dorsal surface with a greenish shine. There is a large, round, black spot on the elytra before the apex, as well as dense, fine, yellowish setae, mixed with dense, longer, erect, yellow setae.
The species name is derived from Greek parádoxos (meaning contrary to expectation) and refers to the particular shape of aedeagus and pronotum, as well as the black elytral spot.