Liesl is a feminine given name of German origin. It is a diminutive of Lieselotte and Elisabeth. Notable people with the name include:
Liesl Herbst (1903–1990), Austrian tennis player Liesl Ischia, Australian diver Liesl Jobson, South African poet Liesl Karlstadt (1892–1960), German actress and cabaret performer Liesl Perkaus (1905–1987), Austrian track and field athlete Liesl Seewald, Austrian luger Liesl Tommy, South African-American director
Fictional characters Liesl von Trapp, a character in The Sound of Music and fictionalized version of Agathe von Trapp