is a Croatian professional football manager and former player.

Bilić, who played as a defender, began his career in 1988 with his hometown club Hajduk Split, later having successful spells with Karlsruher SC in Germany, and West Ham United and Everton in England before retiring from active football in 2001. At the international level, Bilić served as one of Croatia's most consistent defenders during the tenure of coach Miroslav Blažević, earning 44 caps between 1992 and 1999, and playing in UEFA Euro 1996 and the 1998 FIFA World Cup, helping the team to the third place at the latter tournament.

Following his playing retirement in 2001 at Hajduk Split, Bilić coached the team in the second half of the 2001–02 season. Between 2004 and 2006, he managed the Croatia national under-21 team before taking over the senior national side. He led the team to the quarter-finals of the 2008 European Championship and left after the next edition four years later. He was praised for his long-standing service to the national side and credited with successfully overseeing the introduction of a series of young players from the under-21 squad to the senior side. He left for the Russian club Lokomotiv Moscow in 2012 and then spent two years apiece managing Turkish club Beşiktaş and West Ham United. During the 2018–19 season he was the head coach of Al-Ittihad, and on 13 June 2019 he became the manager of West Bromwich Albion. After this he became manager of Chinese team Beijing Guoan, before becoming manager of Watford in 2022.