Tatsuo (written: , , , , , , , , , , , , , , , , , or ) is a masculine Japanese given name. Notable people with the name include:

, Japanese actor , Japanese engineer Tatsuo Fukuda (福田達夫, born 1967), Japanese politician , Japanese swimmer , Japanese automotive engineer , Japanese politician , Japanese writer, poet and translator , Japanese ice hockey player , Japanese artist Tatsuo Itoh, American academic , Japanese water polo player , Japanese judge , Japanese singer-songwriter , Japanese politician , Japanese diplomat and writer , Japanese sport wrestler , Japanese baseball player , Japanese cross-country skier , Japanese computer scientist , Japanese photographer , Japanese writer , Japanese linguist , Japanese sport wrestler , Japanese anime director , Japanese politician , Japanese karateka , Japanese sprinter , Japanese cinematographer , Japanese karateka , Japanese decathlete , Japanese ornithologist and academic , Japanese ski jumper , Japanese politician , Japanese actor , Japanese karateka , Japanese politician , Japanese animator on Lupin the 3rd Part III , Japanese illustrator and character designer

See also 2957 Tatsuo, a main-belt asteroid Tetsuo (given name)