Neopediasia is a genus of moths of the Crambidae family. It contains only one species, Neopediasia mixtalis, which is found in the Russian Far East, China (Sichuan, Shensi, Yunnan, Shantung, Kansu, Kiangsu, Manchuria), Korea and Japan.
The wingspan is 10-13 mm.
The larvae feed on Panicum species.