Genetic studies of the ferret badgers Melogale conducted in Vietnam have shown that this area is inhabited by three species, M. moschata, M. personata, and M. cucphuongensis, which can be attributed to sibling species (cryptic species). M. personata was found to be widespread not only in southern and central Vietnam, but also in the northern provinces (Lang Son, Ha Giang, Ninh Binh), while M. cucphuongensis was found in the provinces Lang Son, Ha Giang, Cao Bang, and Dak Lak, apart from Ninh Binh, from where it was described. The data obtained suggest a sympatric distribution of all three species over the Vietnam area and confirm sympatry of M. personata and M. moschata in southern Vietnam, which has been earlier established on the basis of morphological data.