Clifton David Briley (born January 8, 1964) is an American public servant for the city of Nashville, Tennessee. A Democrat, he was the eighth mayor of Metropolitan Nashville and Davidson County. He was elected in 2015 as vice-mayor and was sworn in as acting mayor after Megan Barry's resignation on March 6, 2018. Briley went on to win the May 24 special election for the balance of Barry's term with 55% of the vote over nearly a dozen challengers, avoiding a runoff and making him the official mayor of Nashville. John Cooper defeated Briley in the 2019 Nashville mayoral election. Briley was the first native of both Nashville and Tennessee since Bill Boner in 1991 to be mayor.

Briley is a lifelong Nashvillian, and his grandfather Beverly Briley was the first elected mayor of Metropolitan Nashville. His early education included Glendale Elementary School, Lipscomb Middle School, and Montgomery Bell Academy.

Briley earned a bachelor's degree from Georgetown University in 1987 before traveling to Latin America where he volunteered as a teacher of English. He completed his JD at Golden Gate University in 1995 and received honors for administrative and environmental law.

Briley was elected to serve as an At Large Metro Councilman for Davidson County from 1999 to 2007. He was the Vice-Chair of the Budget and Finance Committee and held seats on the Personnel, Public Information, Human Relations and Housing Committee, the Traffic and Parking Committee and the Greenways Committee. He was past Chair of the Ad Hoc Committee on Solid Waste and the Water Rate Oversight Committee.

Briley was voted Best Council Member by the Nashville Scene in 2001, 2002 and 2006 and was spotlighted as one of "40 under 40" by Business Nashville magazine in June 2000.

During the 2000 presidential election, Briley was a Tennessee state co-chair of GoreNet. GoreNet was a group that supported the Al Gore campaign with a focus on grassroots and online organizing as well as hosting small dollar donor events.

In November 2006, Briley announced his candidacy for Mayor of Nashville. His campaign included a number of familiar political faces, including Will Cheek Jr., member of the Democratic National Committee and former chair of the Tennessee Democratic Party, and his son, Will Cheek III, an attorney at the firm of Bone McAllester Norton. Jerry Martin, who served at Finance Director under Congressman Jim Cooper in 2002, chaired the campaign's finance committee. Emily Passini was campaign manager; Drew Staniewski was deputy campaign manager. Sarah Lingo was finance director and Alex Youn was director of field operations. Briley finished fifth in the August 2007 election and returned to private life.

In 2015, Briley was elected Vice Mayor of Nashville. On March 6, 2018, Mayor Megan Barry resigned her position after pleading guilty to felony theft in a plea bargain regarding improper use of public funds for travel expenses and an affair with the head of her security, leaving the Vice Mayor to fill the position. Briley was sworn in as acting mayor of Metro Nashville.