SS Iberian was a British cargo steamship that was built in England in 1900 and sunk by a U-boat in 1915.

[1] Toward the end of the 1890s, Leyland & Co ordered two single-screw cargo ships from Sir James Laing & Sons of Sunderland.

[8] Toward the end of July 1915 Iberian left Manchester, England for Boston, Massachusetts, laden with general cargo.

On 30 July U-28 torpedoed her in the Southwestern Approaches about 9 nautical miles (17 km) southwest of Fastnet Rock, Ireland.

[9] U-28's commander, Kapitänleutnant Freiherr Georg-Günther von Forstner, reported that the torpedo hit Iberian's stern, and that she sank rapidly, stern-first, with her bow clear of the sea, and her hull almost vertical.

Forstner reported that as well as the débris, the explosion threw into the air a giant sea creature, about 60 feet (18 m) long.