Hiroo (given name)

• Hiroo Ishii, Japanese baseball player and politician
• Hiroo Kanamori, Japanese seismologist
• Hiroo Kawai, Japanese golfer
• Kotoryū Hiroo, Japanese sumo wrestler
• Masurao Hiroo, Japanese sumo wrestler
• Hiroo Ōhara, Governor of Hiroshima Prefecture
• Hiroo Shima, Japanese ski jumper
• Hiroo Unoura, Japanese businessman
• Hiroo Yamagata, Japanese writer