Dennis Webster DeConcini (born May 8, 1937) is an American lawyer, philanthropist, politician. He served as the Democratic U.S. Senator from Arizona from 1977 until his retirement in 1995. He was replaced by Jon Kyl. DeConcini was born in Tucson, Arizona.
In February 1995 DeConcini was appointed by President Bill Clinton to the Board of Directors of the Federal Home Loan Mortgage Corporation (Freddie Mac), where he served until May 1999.
DeConcini is a member of the Board of Directors of the International Centre for Missing & Exploited Children (ICMEC), a global nonprofit organization that combats child sexual exploitation, child pornography, and child abduction.
In June 2021, President Joe Biden nominated DeConcini as a Member of the Board of Trustees of the Barry M. Goldwater Scholarship Foundation. His nomination was confirmed by the U.S. Senate in December 2021.