SS Isaac M. Singer was a Liberty ship built in the United States during World War II.

She was named after Isaac M. Singer, an American inventor, actor, and businessman.

Isaac M. Singer was laid down on 17 October 1944, under a Maritime Commission (MARCOM) contract, MC hull 2506, by the St. Johns River Shipbuilding Company, Jacksonville, Florida; she was sponsored by Mrs. William C. Calvin, the wife of the president of the International Brotherhood of Boilermakers and Iron Shippbuilders of America, and was launched on 19 November 1944.

On 20 September 1948, she was laid up in the National Defense Reserve Fleet, Mobile, Alabama.

She was sold for scrapping, along with SS Stephen Furdek, on 13 May 1970, to Union Minerals & Alloys Corp., for $64,202.