Caio is a Portuguese masculine given name derived from the Latin name Gaius. People with that name include:
Antônio Caio da Silva Sousa, a Brazilian footballer
Caio Alves, a Brazilian footballer
Caio César, a Brazilian voice actor
Caio Ribeiro, a Brazilian footballer
Caio Blat, a Brazilian actor
Caio Canedo Corrêa, a Brazilian footballer
Wolnei Caio, a Brazilian footballer
Caio Zampieri, a Brazilian professional tennis player
Caio Bonfim, a Brazilian racewalker
Caio Ibelli, a Brazilian professional surfer
Caio Torres, a Brazilian professional basketball player
Caio Prado Júnior, a Brazilian historian, geographer, writer and politician
Caio Fernando Abreu, a Brazilian writer
Caio Castro, a Brazilian actor
Caio Koch-Weser, a German politician
Caio Lucas Fernandes, a Brazilian footballer
Caio Magalhães, a Brazilian professional mixed martial artist
Caio Mendes, a Brazilian footballer
Caio Blinder, a Brazilian journalist, writer and TV presenter
Caio Canedo Corrêa, a Brazilian footballer
Caio Souza, a Brazilian artistic gymnast
Caio De Cenco, an Italian footballer
Caio Domenico Gallo, an Italian historian
Caio Danilo Laursen Tuponi, a Brazilian footballer
Caio Rangel, a Brazilian footballer
Caio Fonseca, an American painter
Caio Henrique Siqueira Sanchez, a Brazilian footballer
Caio Japa, a Brazilian futsal player
Caio Júnior, a Brazilian football manager
Caio Pizzoli, a Brazilian ten-pin bowler
Caio Secco, a Brazilian footballer
Caio Terra, a Brazilian practitioner of Brazilian jiu-jitsu
Caio Vianna Martins, a Brazilian scout
