SS John Stagg was a tanker-type (Z-ET1-S-C3) Liberty ship built at the Delta Shipbuilding Company, New Orleans, Louisiana, during World War II.

She was delivered on 4 September to the United States War Shipping Administration[1] under the management of Bernuth-Lembcke Company, New York City.

John Stagg was a member of Convoy HX 285, which sailed from New York on 28 March 1944 and arrived at Liverpool on 12 April.

[4] John Stagg was a member of Convoy UGS 45, which departed Hampton Roads on 12 June 1944, and arrived at Port Said on 7 July.

On 5 February 1948,[6] John Stagg was sold to the Philadelphia Marine Corp, Dover, Del.