Jost Metzler (26 February 1909 – 29 September 1975) was a German submarine commander during World War II.

Metzler joined the Kriegsmarine in October 1933, after spending eight years in the merchant marine.

After 13 patrols on the minesweeper Grille, he transferred to the U-boat arm in April 1940, commissioning U-69 in November 1940.

The title is derived from the time when U-69 was first assigned to 7th U-boat Flotilla and the crew were instructed to paint Günther Prien's snorting bull insignia on the U-boat's conning tower.

No illustration was enclosed, so U-69's First Watch Officer, Oberleutnant zur See Hans-Jürgen Auffermann instructed a shipyard worker to copy the head of laughing cow which appeared on the packaging of a popular French dairy product instead.