is a Japanese surname. Notable people with the surname include:
Shinobu Ishihara (1879–1963), physician
Ishihara test, a test to determine colourblindness
Daisuke Ishihara (born 1971), former football player
Fujio Ishihara (born 1933), writer
Kaori Ishihara (born 1993), voice actress and pop singer
Katsuki Ishihara (born 1939), former freestyle swimmer
Katsuya Ishihara (born 1978), former football player
Kazuyuki Ishihara (born 1958), garden designer
Kuniko "Satomi" Ishihara (born 1986), actress
Mitsuru Ishihara, animator
Melody Ishihara (born 1982), former J-Pop singer
Naoko Ishihara (born 1974), sport shooter
Shinichi Ishihara (born 1960), singer and (voice) actor
Shintaro Ishihara (1932–2022), author, politician, governor of Tokyo
Hirotaka Ishihara (born 1964), politician, Shintaro's third son
Nobuteru Ishihara (born 1957), politician, Shintaro's eldest son
Yoshizumi Ishihara (born 1962), actor and weatherman, Shintaro's second son
Yujiro Ishihara (1934–1987), actor and singer, Shintaro's younger brother
Takamasa "Miyavi" Ishihara (born 1981), singer-songwriter, record producer and actor Taku Ishihara (born 1988), former football player Tatsuya Ishihara (born 1966), anime director from Maizuru Teruto Ishihara (born 1991), MMA fighter Tsunekazu Ishihara (born 1957), game designer, businessman, and president of The Pokémon Company