Renaat Julien Landuyt (born 28 January 1959) is a Belgian socialist politician.

He served as secretary of the parliamentary investigation into the Dutroux Affair.

After the 1999 general elections Landuyt became Flemish minister of Labour and Tourism.

After Steve Stevaert resigned from the Flemish government in 2003, Landuyt took over his portfolio of Deputy Minister-President on top of his own Minister of Labour and Tourism for the remainder of the term.

He was elected again to the Belgian Parliament in June 2007 and after the establishment of the Leterme I Government took up his seat, in 2010 he was re-elected.