Carl Haeberlin (15 December 1870 – 12 November 1954), sometimes also spelled Häberlin, was a German physician and natural historian. He was influential for the development of climatotherapy and thalassotherapy in Germany and founded the Dr. Carl-Häberlin-Friesenmuseum in Wyk auf Föhr. He is not to be confused with the German psychologist Carl Haeberlin (1878–1947).