SS or MS Mormacyork may refer to one of two Type C3 ships built for the United States Maritime Commission on behalf of Moore-McCormack Lines:
- SS Mormacyork (1939) (MC hull number 43), built by Federal Shipbuilding; transferred to the United States Navy as submarine tender USS Pelias (AS-14) in 1940; scrapped 1973
- MS Mormacyork (1940) (MC hull number 45), built by Sun Shipbuilding; transferred to the United States Navy as transport USS Anne Arundel (AP-76) in 1942; scrapped 1970
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.