
Captain Son will turn 34 in July and he is now playing for Los Angeles FC in Major League Soccer, having left Tottenham Hotspur and the English Premier League a year ago.
He heads an experienced Korean squad that also features Paris St-Germain midfielder Lee Kang-in, Bayern Munich defender Kim Min-jae and Wolverhampton Wanderers forward Hwang Hee-chan.
South Korea have been drawn in Group A with co-hosts Mexico, the Czech Republic and South Africa.
They will play all their first-round games in Mexico and take on the Czechs in their opener on June 11.
Besiktas striker Oh Hyeon-gyu was also included in coach Hong Myung-bo’s 26-man squad, along with Celtic’s Yang Hyun-jin and Birmingham’s Paik Seung-ho.
German-born Jens Castrop of Borussia Moenchengladbach also made the cut.