The Pacific-Union Club is a social club located at 1000 California Street in San Francisco, California, at the top of Nob Hill. It was founded in 1889 as a merger of two earlier clubs: the Pacific Club (founded 1852) and the Union Club (founded 1854). The clubhouse was built as the home for the silver magnate James Clair Flood. The former Flood Mansion is located in the Nob Hill neighborhood. It was designed by Willis Polk. It is considered the first brownstone constructed west of the Mississippi River. Along with the Fairmont Hotel across the street, it was the only structure in the area to survive the San Francisco earthquake and fire of 1906.
This club figured prominently in the history of the west coast of the United States. Many prominent citizens have been active among its membership.
- John Barneson, founder of General Petroleum Corporation, General Pipe Line Company
- Riley P. Bechtel, CEO, Bechtel Corporation
- Stephen Bechtel, Jr., former CEO, Bechtel Corporation
- Warren A. Bechtel, founder of Bechtel Corporation
- Benjamin Biaggini, former president and CEO, Southern Pacific Railroad
- William Lane Booker, British diplomat
- Benjamin Dillingham
- William Henry Draper III, businessman
- Paul B. Fay, former Undersecretary of the Navy and PT-109 crewmate of John F. Kennedy
- Tirey L. Ford, former California Attorney General
- Henry F. Grady, first US Ambassador to India; Dean of the Commerce Department at the University of California, Berkeley; President of American President Lines
- Walter A. Haas, Jr., CEO (1958-1976) and chairman (1970-1981) of Levi Strauss & Co
- Randolph Apperson Hearst
- William Randolph Hearst, Jr.
- William Randolph Hearst III
- William Redington Hewlett, co-founder of Hewlett Packard
- Henry J. Kaiser, engineer and founder of Kaiser Family Foundation
- William S. Mailliard
- Robert McNamara, former U.S. Secretary of Defense
- David Packard, co-founder of Hewlett Packard and former U.S. Deputy Secretary of Defense
- R.A.F. Penrose, Jr., prominent geologist
- Donald J. Russell, former president, Southern Pacific Railroad
- Charles R. Schwab, founder of Charles Schwab Corporation
- Caspar Weinberger, former U.S. Secretary of Defense
- Lara, Adair (2004-07-18). "THE CHOSEN FEW / S.F.'s exclusive clubs carry on traditions of fellowship, culture -- and discrimination". SFGate. Retrieved 2019-01-26.