Allan Henry Hoover (July 17, 1907 – November 4, 1993) was the younger son of President Herbert Hoover and First Lady Lou Henry. His elder brother was Herbert Clark Hoover, Jr. (1903 – 1969). Allan was a mining engineer, rancher, and financier.
He was born in London on July 17, 1907. He graduated from Palo Alto High School, Stanford University, and Harvard Business School. He was married to Margaret Coberly Hoover with two sons, Andrew and Allan, Jr., and a daughter, Lou Henry.
For years he served in foundations and institutions, honoring the Hoover family, such as 50-year leadership of the Hoover Institution at Stanford University. Moreover, he bought his father's birthplace in West Branch, Iowa for $4,500 and turned it into the Herbert Hoover Presidential Library and Museum. He also served his interests worldwide in mining, agriculture, and financing.
- Hart, Craig (2004). A genealogy of the wives of the American presidents and their first two generations of descent. North Carolina, Jefferson: McFarland & Co., Inc., p. 129
- "Heart Attack Fatal in New York apartment after concert". The Milwaukee Sentinel (Milwaukee, Wisconsin). January 8, 1944. Front page.
- "Allan Hoover; President's Son Was Rancher, Financier". Los Angeles Times. November 8, 1993.
- "Allan Hoover Is Dead; President's Son Was 86". The New York Times. November 9, 1993.
- Hoover Genealogy at National Park Service