Harsanyi or Harsányi is a Hungarian surname. Notable people with the surname include:
Borbála Tóth Harsányi (born 1946), Hungarian handballer David Harsanyi (born 1970), American journalist. Gábor Harsányi (born 1945), Hungarian actor and voice actor Gergely Harsányi (born 1981), Hungarian handballer John Harsanyi (1920–2000), Hungarian-Australian-American economist and Nobel Prize winner Janice Harsanyi (1929–2007), American soprano singer and college professor Tibor Harsányi (1898–1954), Hungarian-born composer and pianist Vera Harsányi (1919–??), Hungarian freestyle swimmer Zoltán Harsányi (born 1987), Slovak footballer at Pécsi MFC Zsolt Harsányi (1887–1943), Hungarian author, dramatist, translator, and writer