Guasch is a surname. Notable people with the surname include:
Andrea Guasch (born 1990), Spanish actress, singer, composer, and dancer Bernard Guasch (born 1960), French rugby player David Guasch (born 1990), French rugby player Domènec Guasch, football executive Jorge Guasch (born 1961), Paraguayan football player Mike Guasch (born 1958), American businessman and racing driver Ricardo Guasch (1933–2010), Mexican equestrian Sara Guasch (1918–2005), Chilean actress Toni Soler i Guasch (born 1965), Spanish journalist, television producer and writer