Konishi (written: 小西) is a Japanese surname. Notable people with the surname include:
Gaku Konishi (小西 岳) (born 1934), Japanese physicist
Hiroko Konishi (小西 寛子) (born 1975), Japanese voice actress
Konishi Hirosada (小西 廣貞) (ca. 1810–1864), Japanese ukiyo-e artist
Hiroyuki Konishi (小西 裕之) (born 1963), Japanese gymnast
Hokuto "Hok" Konishi (born 1984), Japanese-born British dancer
Katsuyuki Konishi (小西 克幸) (born 1973), Japanese voice actor
Kenichi Konishi (小西 健一) (born 1909), Japanese field hockey player
Kenji Konishi (小西 健司) (born 1955), Japanese electronic musician
Manami Konishi (小西 真奈美) (born 1978), Japanese actress
Masakazu Konishi (小西 正一) (born 1933), Japanese neurobiologist
Miho Konishi (小西 美帆) (born 1977), Japanese actress
Nagako Konishi (born 1945), Japanese composer
Ryosei Konishi (小西 遼生) (born 1982), Japanese actor and voice actor
Sadaaki Konishi, Imperial Japanese Army officer
Takako Konishi (office worker) (died 2001), Japanese office worker and suicide victim
Takako Konishi (synchronized swimmer) (born 1986), Japanese synchronized swimmer
Tokuro Konishi (小西 得郎) (1894–1977), Japanese baseball player and coach
Yasuharu Konishi (小西 康陽) (born 1959), Japanese musician, composer and DJ
Yasuhiro Konishi (小西 康裕) (1893–1983), Japanese karateka
Yukari Konishi, Japanese sport shooter
Konishi Yukinaga (小西 行長) (1555–1600), Japanese daimyō
