Hiroo (given name)
{{Infobox given name
| name = Hiroo
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| gender = Male
| meaning = Different meanings depending on the kanji used
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| origin = Japanese
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Hiroo (written: 浩生, 浩郎, 広生, 宏央, 博大, 博夫, 博雄) is a masculine Japanese given name.
People with the name
Notable people with the name include:
- {{Nihongo|Hiroo Ishii|石井 浩郎||born 1964}}, Japanese baseball player and politician
- {{Nihongo|Hiroo Kanamori|金森 博雄||born 1936}}, Japanese seismologist
- {{Nihongo|Hiroo Kawai|河井 博大||born 1971}}, Japanese golfer
- {{Nihongo|Kotoryū Hiroo|琴龍 宏央||born 1972}}, Japanese sumo wrestler
- {{Nihongo|Masurao Hiroo|益荒雄 広生||born 1961}}, Japanese sumo wrestler
- {{Nihongo|Hiroo Ōhara|大原 博夫||1894–1971}}, Governor of Hiroshima Prefecture
- {{Nihongo|Hiroo Onoda|小野田 寛郎||1922–2014}}, Imperial Japanese Army intelligence officer
- {{Nihongo|Hiroo Shima|嶋 宏大||born 1963}}, Japanese ski jumper
- {{Nihongo|Hiroo Unoura|鵜浦 博夫||born 1949}}, Japanese businessman
- {{Nihongo|Hiroo Yamagata|山形 浩生||born 1964}}, Japanese writer