An annotated checklist of oribatid mite taxa from three caves of Dong Nai Biosphere Reserve (Southern Vietnam) is provided. We recorded 33 species, 29 genera and 16 families, of which 10 species, five genera and two families were found in Vietnam for the first time. Three species, Malaconothrus variosetosus, Discoppia cylindrica and Machuella lineata, are for the first time recorded from the Or...