SS Stepas Darius was a Liberty ship built in the United States during World War II.

She was named after Steponas Darius, a Lithuanian American pilot, who died in a non-stop flight attempt with Lituanica from New York City to Kaunas, Lithuania, in 1933.

Stepas Darius was laid down on 14 August 1944, under a Maritime Commission (MARCOM) contract, MC hull 2320, by J.A.

Jones Construction, Panama City, Florida; sponsored by Mrs. Harley Ferguson, wife of assistant general manager JAJCC; and launched on 25 September 1944.

[4] On 21 January 1955, while sailing from Hampton Roads to Rotterdam, with 9,000 st (130,000 lb; 57,000 kg) of coal, she ran aground off the Round Island, Scilly Islands, when her engines failed.