Katsuo (written: , , or ) is a masculine Japanese given name. Notable people with the name include:
, Japanese basketball player , Japanese boxer , Japanese boxer , Japanese footballer , Japanese sumo wrestler , Japanese actor , Japanese long-distance runner , Japanese long-distance runner and politician , Japanese baseball player , Japanese swimmer , Japanese boxer , Japanese sumo wrestler Cleyton Katsuo (クレイトンカツオ, born 1988), Brazilian woodworker and developer , Japanese politician
Fictional characters , a character in the manga series Sazae-san
See also Katsuo, Japanese name for Skipjack tuna and occasionally its substitute bonito Katsuō-ji, a Buddhist temple in Osaka Prefecture, Japan