Lemyra jankowskii is a moth of the family Erebidae. It was described by Oberthür in 1881.It is found in China (Sichuan, Shaanxi, Shanxi, Jiangsu, Zhejiang, Yunnan, Heilongjiang, Liaonin, Hebei, Shandong, Tibet, Jilin, Beijing, Qinghai, Hubei, Guangxi), south-eastern Russia and the southern Kuriles. The species is named after the collector Michał Jankowski from whose specimens it was described.