Willy Hess (14 July 1859 – 17 February 1939) was a German violinist and violin teacher.
Willy Hess was born in Mannheim on 14 July 1859. He commenced the study of violin when only five years of age with his father, who was a pupil of Ludwig Spohr. When aged seven his family moved to the United States and as a youth he performed with his sister Joanna who accompanied him on pianoforte, making a number of successful tours around the country. In 1872 he moved back to Europe, spending a year in the Netherlands and performing in a number of continental cities. In 1874 he made an extended tour including London, Belgium and France. In 1876 he went to Berlin to be a student of Joseph Joachim and after two years left to take up the leadership of the Oper Frankfurt.