Ernst Ludwig Wynder (April 30, 1922 – July 14, 1999) was an American epidemiology and public health researcher who studied the health effects of smoking tobacco.
His and Evarts Ambrose Graham joint publication of "Tobacco Smoking as a Possible Etiologic Factor in Bronchiogenic Carcinoma: A Study of 684 Proved Cases" appeared in the Journal of the American Medical Association.
It was one of the first major scientific publications identifying smoking as a contributory cause of lung cancer.