Zell Bryan Miller (February 24, 1932 – March 23, 2018) was an American politician who served as the 79th governor of Georgia from 1991 to 1999 and as a United States senator representing the state from 2000 to 2005. He was a member of the Democratic Party and before 2021 was the last Democratic senator from Georgia. He is also the last Democrat as of 2025 to be elected twice as Governor of Georgia.

Miller served as lieutenant governor of Georgia from 1975 to 1991. He was a conservative Democrat as a senator in the 2000s. In 2004, he backed Republican president George W. Bush over Democratic nominee John Kerry in the presidential election. Miller was a keynote speaker at both major American political parties' national conventions–Democratic in 1992 and Republican in 2004.

He did not seek re-election to the Senate in 2004. After retiring from the Senate, he joined the law firm McKenna Long & Aldridge as a non-lawyer professional in the firm's national government affairs practice. Miller was also a Fox News contributor. After he left his office in 2005, no Georgia Democrats were elected to the United States Senate for 16 years until Raphael Warnock won Miller's former seat in the 2020–2021 special runoff election and Jon Ossoff won the Class 2 seat in the 2020–2021 regular runoff election.

Miller was born in the small mountain town of Young Harris, Georgia. His father, Stephen Grady Miller (1891–1932), was a teacher who died of cerebral meningitis when Miller was a 17-day-old infant, and the future politician was raised by his widowed mother, Birdie Bryan (1893–1980). He had a sister, Jane, who was six years older than he. As a child, Miller lived both in Young Harris and Atlanta. Miller received an associate degree from Young Harris College in his home town and later attended Emory University.

Less than a month after the Korean War armistice, Miller wound up in a drunk tank in the mountains of North Georgia. Miller stated later that this incident was the lowest point of his life. Upon his release, Miller enlisted in the Marines. During his three years in the United States Marine Corps, Miller attained the rank of sergeant. He often referred to the value of his experience in the Marine Corps in his writing and stump speeches. In his book on the subject, entitled Corps Values: Everything You Need to Know I Learned in the Marines, he wrote:

In the twelve weeks of hell and transformation that were Marine Corps boot camp, I learned the values of achieving a successful life that have guided and sustained me on the course which, although sometimes checkered and detoured, I have followed ever since.

After serving in the Marines, Miller enrolled in 1956 and earned bachelor's and master's degrees in history from the University of Georgia. He taught history at Young Harris College following his graduation from the University of Georgia.

Miller's parents were both involved in local politics in the North Georgia mountains. Miller, a Democrat, taught history and political science at Young Harris College, before becoming mayor of Young Harris from 1959 to 1960. He was elected to two terms as a Georgia state senator from 1961 until 1964. In 1964 and 1966, Miller unsuccessfully sought the Democratic nomination for the United States House of Representatives. He endorsed segregation in both races. In these congressional races, Miller denounced Lyndon Johnson as ""a Southerner who has sold his birthright for a mess of dark porridge.". Miller later served in state government as the executive secretary to Governor Lester Maddox and in the Georgia Democratic Party, and was the Georgia state chairman for Walter Mondale's 1984 presidential campaign.