Onishi
Onishi stands for:
- a former community in the Japanese prefecture of Gunma, incorporated into Fujioka (Gunma)
Ōnishi stands for:
- a former municipality in the Japanese prefecture of Ehime, incorporated into Imabari
Ōnishi is the family name of the following people:
- Akiyo Ōnishi (* 1978), Japanese marathon runner
- Hiroshi Ōnishi (1961–2011), Japanese painter and university professor
- Junko Ōnishi (musician) (* 1967), Japanese jazz pianist
- Junko Ōnishi (swimmer) (* 1974), Japanese swimmer
- Kōji Ōnishi (* 1988), Japanese football player
- Masayuki Ōnishi (* 1977), Japanese football player
- Shōgo Ōnishi (* 1990), Japanese football player
- Tadao Ōnishi (1943–2006), Japanese football player and coach
- Takashi Ōnishi (* 1971), Japanese football player
- Ōnishi Takijirō (1891–1945), Japanese admiral
- Takuya Ōnishi (* 1975), Japanese astronaut
- Yōhei Ōnishi (* 1982), Japanese football player
- Yuka Ōnishi (* 1968), Japanese actress and singer
- Yūki Ōnishi (* 1996), Japanese football player
