An updated list of Issidae known from Vietnam is provided. Two new species, one from the genus Darwallia Gnezdilov, 2010, and another one from a new genus are described from the Hòn Bà massif in Central Vietnam. A key to species of the genus Darwallia is provided. Gelastyrella hainanensis Ran et Liang, 2006 is placed in synonymy under Thabena litaoensis Yang, 1994. This last taxon and the genus Gergithoides Schumacher, 1915 are recorded for the first time for Vietnamese fauna. New records in Vietnam are given for Tetrica philo Fennah, 1978 and Gergithus iguchii Matsumura, 1916.