Spencer Fox Eccles (born August 24, 1934, Ogden, Utah) is a prominent financier and philanthropist in Salt Lake City, Utah and chairman emeritus of the Intermountain Region of Wells Fargo Corporation.

From 1982 to 2000, he was chairman and chief executive officer of First Security Corporation of Salt Lake City, which was, until its sale to Wells Fargo in 2000, the largest banking organization in the Mountain West measured by assets, deposits and market capitalization.

In addition to his role at First Security, Eccles has also been a director of the Union Pacific Railroad, Intermountain Health Care, the Federal Reserve Bank of San Francisco, the National Chamber of Commerce, the ZCMI Corporation, the Anderson Lumber Company, Amalgamated Sugar, the Alta Ski Corporation, the U.S.

Utah news organizations have identified Eccles as one of the handful of most influential people in the state, along with the President of the Church of Jesus Christ of Latter-day Saints, the Governor, and Orrin Hatch, the state's former senior senator.

[6] His daughter, Hope Eccles, is married to former Vice Chair of the Federal Reserve Randal Quarles.