Eleven taxa of Neoperlini are described from Southeast Asia.Phanoperla laosp. n. (Thailand),P. lisusp. n. (Thailand),Neoperla lahusp. n. (Thailand),N.edmundsisp. n. (East Malaysia),N. gordonaesp. n. (Thailand) andN.thaisp. n. (Thailand) are described and holotype specimens are designated for each species. Five additional taxa known from single specimens or females are described but not named. Descriptions are supported by line drawings of genitalia and SEM photomicrographs of eggs. The first report ofPhanoperla sertispinaJewett from Thailand is given.