Neoserica weishanica is a species of beetle of the family Scarabaeidae. It is found in China (Yunnan).
Adults reach a length of about 9.7 mm. They have a reddish brown, oblong body. The antennal club is yellowish brown, the labroclypeus is shiny and the dorsal surface is dull, with dense and erect setae.
The species is named according to its type locality, Weishan mountains.