Nanohyla hongiaoensis is a species of frog in the family Microhylidae.

It is only known from Bidoup Nui Ba National Park in Lam Dong Province, Vietnam.

[2] Little is known about the species or its distribution and so it is likely to be rated data deficient by the IUCN Red List.

[1] Nanohyla hongiaoensis was originally described as Microhyla hongiaoensis, but a 2021 study using morphological and phylogenetic evidence moved nine species (including N. hongiaoensis) to a new genus, Nanohyla.

[3] Both the Hongiao narrow-mouth frog and its scientific specific epithet, hongiaoensis, are named for the type locality of the species, the Hon Giao forest in Bidoup Nui Ba National Park.