Harold Kainalu Long Castle

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Harold Kainalu Long Castle
Harold Kainalu Long Castle playing polo, Honolulu Star-Bulletin, 1914.jpg
Harold Kainalu Long Castle playing polo, 1914
Born (1886-07-03)July 3, 1886
Honolulu, Hawaii, USA
Died August 19, 1967(1967-08-19) (aged 81)
Kailua, Honolulu County, Hawaii

Harold Kainalu Long Castle (July 3, 1886 – August 19, 1967)[1] was a landowner, real estate developer, and later philanthropist in Hawaii.


Harold Kainalu Long Castle was born July 3, 1886 in Honolulu. Castle was the son of wealthy landowner James Bicknell Castle and Julia White, and grandson of Castle & Cooke founder Samuel Northrop Castle. In 1917, he purchased almost 10,000 acres (40 km2) of land on the windward side of the island of Oahu, in what was then the ahupuaʻa of Kailua, to start his sprawling Kaneohe Ranch.[2][3]

In 1962, he set up the Harold K.L. Castle Foundation, which remains the largest private foundation based in Hawaiʻi.[2] He and his foundation have donated large amounts of land to educational and other public institutions, among them Hawaii Loa College, ʻIolani School, Castle High School, Kainalu Elementary School, Castle Medical Center, and the Mokapu peninsula land that became Marine Corps Base Hawaii.[3]

He and his wife, Alice Hedemann, both graduated from Punahou School, he served on its Board of Trustees (1922-1937), and their descendants have continued to attend and support the school.[2]

Plantation Estate, his home in Kailua, Honolulu County, Hawaii, has been used by Barack Obama as a Winter White House during Christmas vacations in 2008, 2009, and 2010.

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