Opsariichthys kaopingensis is a species of freshwater ray-finned fish belonging to the family Xenocyprididae, the East Asian minnows or sharpbellies. It is endemic to southern Taiwan and has a maximum standard length of . The specific name kaopingensis refers to its type locality, Kaoping River.
References Also published as a chapter in the book Developments in Environmental Biology of Fishes, vol 28: Chinese Fishes.