Hiraoka (written: 平岡) is a
Japanese surname. Notable people with the surname include:
*, Japanese samurai
*, Japanese politician
*, Japanese drifting driver
*, Japanese judoka
*, Japanese footballer
*, Japanese writer, poet, playwright, actor and film director, better known as Yukio Mishima
*, Japanese footballer and manager
*, Japanese mayor
*, Japanese snowboarder
*, Japanese footballer
*, Japanese footballer
*, Japanese footballer
*, Japanese actor
{{surname, Hiraoka
Japanese-language surnames