Hirooka (written: 広岡 or 廣岡) is a Japanese surname. Notable people with the surname include:
- Asako Hirooka (広岡 浅子, 1849–1919), Japanese businesswoman, banker and college founder
- Ryan Yuki Hirooka (広岡 勇輝, born 1990), Japanese footballer
- Taishi Hirooka (廣岡 大志, born 1997), Japanese baseball player
- Tatsuro Hirooka (広岡 達朗, born 1932), Japanese baseball player
See also
- Hirooka Station, a railway station in Shiojiri, Nagano Prefecture, Japan
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