J. P. Morgan Jr., American banker and philanthropist (d. 1943)
John Pierpont "Jack" Morgan Jr. (September 7, 1867 – March 13, 1943) was an American banker, finance executive, and philanthropist. He inherited the family fortune and took over the business interests including J.P. Morgan & Co. after his father J. P. Morgan died in 1913.

After graduating from St. Paul's School and Harvard College, Morgan trained as a finance executive working for his father and grandfather. He became a banking financier, a lending leader, and a director of several companies. He supported New York's Society for the Lying-In Hospital, the Red Cross, the Episcopal Church, and endowed the creation of a rare book and manuscript collection at the Morgan Library.

Morgan brokered a deal that positioned his company as the sole munitions and supplies purchaser during World War I for the British and French governments, bringing his company a 1% commission on $3 billion ($30 million). He was also a banking broker for financing to foreign governments both during and after the war.