Ernst Kals (2 August 1905 – 2 November 1979) was a Kapitän zur See with the Kriegsmarine during World War II.

In October 1940, after a period of service on torpedo boats and light cruisers, he transferred to the Ubootwaffe ("U-boat force").

[1] In April 1942, Kals, in U-130, bombarded the Allied petroleum tank farm on Curaçao, in the Netherlands Antilles.

In five minutes he sank three United States troopships, the Edward Rutledge, Hugh L. Scott and Tasker H.

Promoted to Kapitän zur See in September 1944, he remained in this position until the end of the war.