William Andrews Clark Jr.

William Andrews Clark Jr.
Born	March 29, 1877 Deer Lodge, Montana, US
Died	June 14, 1934(1934-06-14) (aged 57) Salmon Lake, Montana, US
Occupation(s)	Businessman, lawyer, book collector, philanthropist
Spouses	Mabel Duffield Foster ​ ​ (m. 1902; died 1903)​ Alice McManus ​ ​ (m. 1907; died 1916)​
Partner	Harrison Post
Children	William A. Clark III
Parent(s)	William A. Clark Katherine Louise Stauffer
Relatives	Huguette Clark (sister)

William Andrews Clark Jr. (March 29, 1877 – June 14, 1934) was a Los Angeles–based philanthropist and the youngest surviving son of copper baron and U.S. Senator William Andrews Clark Sr. and his first wife, Katherine.