The paper presents an updated checklist of Diaptomidae in Vietnam, based on literature reviews and on our own data from voucher specimens deposited in the Institute of Ecology and Biological Resources (IEBR), Hanoi. Taxonomic status of diaptomid species occurring in the country is revised. | An annotated checklist of the family Diaptomidae sars, 1903 (Copepoda, Calanoida) in Vietnam