Henry Sturgis Morgan Sr. (October 24, 1900 – February 8, 1982) was an English born American banker, known for being the co-founder of Morgan Stanley and the president and chairman of the Morgan Library & Museum.

Morgan was born on October 24, 1900, in London, United Kingdom to John Pierpont Morgan Jr. (1867–1943) and Jane Norton Morgan (née Grew) (1868-1925). His father was the son of John Pierpont Morgan Sr. (1837–1913) and his mother was the daughter of Boston banker and mill owner Henry Sturgis Grew (1833–1910). He was educated at Groton School and graduated from Harvard University in 1923.^{[citation needed]}

In 1923, the same year he graduated from Harvard, he joined J.P. Morgan & Co. and was a partner from 1928 to 1935.^[1] In 1935, he co-founded Morgan Stanley together with Harold Stanley when the Glass–Steagall Act forced the separation on investment banking and commercial banking.^[1]

At the death of his father in 1943, he and his brother, Junius Spencer Morgan III, inherited the estate.^[2] Morgan owned a 448-acre (1.81 km²) estate, which is located at Eaton's Neck Road, Eatons Neck, New York, United States.^{[citation needed]}

On June 26, 1923,^[3] he married Catherine Frances Lovering Adams (1902–1988), daughter of Frances Lovering and Charles Francis Adams III, the U.S. Secretary of the Navy under Herbert Hoover,^[4] and a descendant of U.S. Presidents John Adams and John Quincy Adams.^[5] The couple had five sons:

• Henry Sturgis Morgan Jr. (1924–2011), a Navy Rear Admiral and maritime lawyer^[6]
• Charles Francis Morgan, who was a Morgan Stanley executive, who married Sarah Baldwin Lambert^[7][8] in 1960.^[9]
• Miles Morgan (b. November 1, 1928)
• John Adams Morgan (b. 1930), who married four times, including to Sonja Tremont (b. 1963)^[10]
• Peter Angus Morgan (1938–2013).^[7][11]

He died on February 8, 1982, in Manhattan, New York City at Columbia-Presbyterian Medical Center.^[1][12]