Two new species of oribatid mites of the superfamily Oripodoidea, Peloribates spiniformis n. sp. and Zygoribatula prima n. sp., are described from dark loamy soil of Lagerstroemia forest of Cat Tien National Park (southern Vietnam). Peloribates spiniformis n. sp. can be included in the Peloribates species group having very short notogastral setae, however it clearly differs from other species by having interlamellar setae that are medio-distally dilated (setiform or spiniform in the other species). Zygoribatula prima n. sp. is the first species of Zygoribatula recorded from Vietnam; it can be included in the species group having a striate notogaster, but differs from other species by the specific localization of the striae. Peloribates rangiroaensis Hammer, 1972 is recorded for the first time in Vietnam. An identification key to all Vietnamese species of Peloribates is presented.