List of shipwrecks in 1921

The list of shipwrecks in 1921 includes all ships sunk, foundered, grounded, or otherwise lost during 1921.

The Wiesbaden-class light cruiser (formerly  Kaiserliche Marine) was sunk as a target ship by United States Army Air Service and United States Navy bombers in the Atlantic Ocean off Cape Henry, Virginia.

The Helgoland-class battleship (ex- Kaiserliche Marine) was sunk as a target by United States Army Air Service aircraft in the Atlantic Ocean off Cape Hatteras, North Carolina.

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