Eupelmus nihoaensis, the Nihoan Eupelmus wasp, is a species of parasitic wasp endemic to the island of Nihoa, Hawaiian Islands.

[1] The species was described by Philip Hunter Timberlake in 1926.

[2] It is listed as "Imperiled" by NatureServe, for habitat loss, climate change, and other factors that are affecting the island of Nihoa, are affecting the species greatly.

[1]