Roustan is a French surname. It may refer to:
Antoine-Jacques Roustan (1734-1808), Genevan pastor and theologian Didier Roustan (1957–2024), French sports journalist Marius Roustan (1870-1942), French politician Max Roustan (born 1944), French politician, National Assembly member for Gard Paul Roustan (born 1979), French body painter and photographer Théodore Roustan (1833-1906), French diplomat
See also Roustam Raza, also known as Roustan