Maladera sontica is a species of beetle of the family Scarabaeidae. It is found in China (Anhui, Jiangxi, Sichuan, Xizang, Yunnan), India (Arunachal Pradesh), Laos, Myanmar, Thailand and Vietnam.
Adults reach a length of about 7.8 mm. They have a reddish brown, oblong-oval body. The antennae are yellowish. The surface is dull (but the labroclypeus is shiny) and glabrous, except for a few short setae on sides of the elytra.