George Blumenthal (April 7, 1858 – June 26, 1941) was a German-born banker who served as the head of the U.S branch of Lazard Frères.

Blumenthal a foreign-exchange banker was sent to the United States by Speyer & Co.,[1] and rose to prominence as the head of the U.S branch of Lazard Frères.

[3] With J. P. Morgan the elder, he was one of five bankers who saved Grover Cleveland from giving up specie payments in 1896, with their $65,000,000 gold loans.

[1] In New York, he served as president of the Mount Sinai Hospital,[4] where he donated $2 million and where the Blumenthal auditorium is named after him.

After the death of his first wife Florence in 1930, the then 77 year old George married Marion "Mary" (née Payne) Clews (1890–1973)[8] in December 1935.