Herbert Giersch (11 May 1921 – 22 July 2010) was a German economist. He was one of the initial members of the German Council of Economic Experts in 1964, serving on the council until 1970, and also was president of the Kiel Institute for the World Economy 1969–1989. Giersch was considered the most influential German economist during the chancellorships of Willy Brandt, Helmut Schmidt, and Helmut Kohl. Originally adherent to Keynesian economics in the 1950s and 1960s, he gradually became an advocate of supply-side economics in his later years.