There were at least two Liberty ships named George Calvert
- USAS American Mariner, Maritime Commission hull number 20, launched in 1941 as SS George Calvert, but renamed almost immediately. Best known as a missile range ship in the 1960s, she served under various prefixes: TS, USAS, USAF, USNS.
- SS George Calvert (1942), Maritime Commission hull number 29, launched in 1942 and sunk off Cuba in 1942 by the German submarine U-753.
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.