Kamiya (written: 神谷) is a Japanese surname. Notable people with the surname include:
Akira Kamiya (神谷 明) (born 1946), Japanese voice actor
Hideki Kamiya (神谷 英樹) (born 1970), Japanese video game designer
Hiroshi Kamiya (神谷 浩史) (born 1975), Japanese voice actor
Mieko Kamiya (神谷 美恵子) (1914–1979), Japanese psychiatrist
Satoshi Kamiya (神谷 哲史) (born 1981), Japanese origami artist
Sayaka Kamiya (神谷 涼) (born 1982), Japanese actress and model
Fictional characters:
Kamiya Kaoru (神谷 薫), protagonist of the manga series Rurouni Kenshin