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:

, Japanese baseball player and politician , Japanese painter and illustrator , Japanese seismologist , Japanese golfer , Japanese sumo wrestler , Japanese sumo wrestler , Governor of Hiroshima Prefecture , Imperial Japanese Army intelligence officer , Japanese ski jumper , Japanese businessman , Japanese writer

See also Hiro (given name)