Akialoa is an extinct genus of Hawaiian honeycreeper in the subfamily Carduelinae of the family Fringillidae. The ʻakialoa species are all extinct, but they formerly occurred throughout Hawaii.

The Oʻahu ʻakialoa, Maui Nui ʻakialoa, and Kauaʻi ʻakialoa were previously considered a single species, called the greater ʻakialoa.

There are 7 species in this genus, two of which are undescribed: