We report the results of a herpetofaunal inventory between July, 2014 and March, 2017 of Parsa National Park that detected 51 herpetofaunal species. Three amphibians (Microhyla nilphamariensis, Sphaerotheca breviceps, and Uperodon taprobanicus), two Gecko species (Hemidactylus flaviviridis and H. frenatus), one Agamid (Sitana fusca), two Skinks (Eutropis carinata and Sphenomorphus maculatus), 13 snakes (Ahaetulla nasuta, Bungarus lividus, Coelognathus helena, Coelognathus radiatus, Chrysopelea ornata, Dendrelaphis tristis, Lycodon aulicus, Lycodon jars, Oligodon arnensis, Psammodynastes pulverulentus, Ptyas mucosa, Rhabdophis subminiatus, and Trimeresurus albolabris), and one crocodile (Crocodylus palustris) are new records to Parsa National Park. This paper aims to highlight the understanding of amphibians and reptiles of Parsa National Park and will be a reference for herpetofaunal management in the park.