The Brazilian Cerrado and Atlantic Forest shelter an especially rich herpetofauna and experience strong anthropogenic disturbances, which is also true for the western portion of Minas Gerais State. Herein, we present a list of the herpetofauna from the Triângulo Mineiro region in Minas Gerais State, southeastern Brazil. From 2012 to 2016, we sampled 28 localities along 23 municipalities in the region, using three sampling methods: active search, pitfall traps, and opportunistic records. We recorded 79 species, 44 amphibians and 35 reptiles. Three species (Bokermannohyla sazimai, Ololygon canastrensis, and Pithecopus azureus) are classified as “data deficient” (DD) according to the IUCN. One species (Proceratophrys moratoi) is classified as “critically endangered” (CR) according to the IUCN Red List, and “endangered” (EN) according to the national red list. However, we suggest listing P. moratoi in the “least concern” category. We also present the first record of Dendropsophus elianeae in Minas Gerais State, and distribution map of the species. Furthermore, we elucidate the composition of the herpetofauna in the Triângulo Mineiro region and contribute to future conservation plans for the region and the species.