Nihoa is a spider genus in the mygalomorph family Barychelidae.
The genus is named after the island Nihoa, where the type species (N. mahina) is endemic.
N. hawaiiensis males have a length of almost 15 mm, including cheliceres; females are up to 21 mm.
Species of this genus occur in Oceania.
Nihoa annulata (Kulczynski, 1908) — New GuineaNihoa annulipes (Thorell, 1881) — New GuineaNihoa aussereri (L. Koch, 1874) — PalauNihoa bisianumu Raven, 1994 — New GuineaNihoa courti Raven, 1994 — New GuineaNihoa crassipes (Rainbow, 1898) — New GuineaNihoa gressitti Raven, 1994 — New GuineaNihoa gruberi Raven, 1994 — New IrelandNihoa hawaiiensis (Raven, 1988) — HawaiiNihoa itakara Raven, 1994 — New GuineaNihoa kaindi Raven, 1994 — New GuineaNihoa karawari Raven, 1994 — New GuineaNihoa lambleyi Raven, 1994 — New GuineaNihoa madang Raven, 1994 — New GuineaNihoa mahina Churchill & Raven, 1992 — HawaiiNihoa maior (Kulczynski, 1908) — New GuineaNihoa mambulu Raven, 1994 — Solomon IslandsNihoa pictipes (Pocock, 1899) — New Guinea, New Britain, New Ireland, Solomon IslandsNihoa raleighi Raven, 1994 — New GuineaNihoa tatei Raven, 1994 — New GuineaNihoa vanuatu Raven, 1994 — New HebridesNihoa variata (Thorell, 1881) — New GuineaNihoa verireti Raven, 1994 — New Guinea