Oka (written: or ) is a Japanese surname. Notable people with the surname include:
Japanese , Japanese zoologist, anatomist and evolutionist Ayumi Oka (born 1983), Japanese actress Ayumi Oka (born 1986), Japanese female tennis player , Japanese fencer , Japanese businessman in whaling Kazuo Oka (born 1948), Japanese voice actor Kiyoshi Oka (1901–1978), Japanese mathematician Masi Oka (born 1974), Japanese American actor and digital effects artist , Japanese sinologist Takeshi Oka (born 1932), Japanese-American chemist and astronomer , Japanese fencer
Indonesia Gedong Bagus Oka (1921–2002), Hindu reformer and philosopher in Indonesia Ida Bagus Oka (1936–2010), Indonesian politician Isyana Bagoes Oka (born 1980), Indonesian news presenter and politician
Côte d'Ivoire Arsene Oka (born 1983), Côte d'Ivoire football (soccer) player Valérie Oka (1967–2023), Côte d'Ivoire artist
India
A. S. Oka, (born 1960), Indian jurist
Fictional characters Oka (Asobi Asobase), a character in the manga series Asobi Asobase Oka Ruto, a character in the video game Yandere Simulator
See also Ōka (surname) Ōoka (disambiguation)