Lindsey Adams Buckingham (born October 3, 1949) is an American musician and record producer, best known as the lead guitarist and co-lead vocalist of the band Fleetwood Mac from 1975 to 1987 and 1997 to 2018. In addition to his tenure with Fleetwood Mac, Buckingham has released seven solo studio albums and three live albums. As a member of Fleetwood Mac, he was inducted into the Rock and Roll Hall of Fame in 1998. Buckingham was ranked 100th in Rolling Stone's 2011 list of "The 100 Greatest Guitarists of All Time". Buckingham is known for his fingerpicking guitar style.

Fleetwood Mac, the band that gave Buckingham his greatest exposure, had been around since the late 1960s, beginning as a British blues outfit led by Peter Green. After Green left the band, they experienced several tumultuous years without a stable frontman. Buckingham was invited to join the band in 1974; they had recorded in the same studio, and the band was lacking a guitarist and male lead vocalist. As a stipulation to joining, Buckingham insisted his musical and romantic partner Stevie Nicks also be included. Buckingham and Nicks became the face of Fleetwood Mac during its most commercially successful period, highlighted by the multi-platinum studio album Rumours (1977), which sold over 40 million copies worldwide. Though highly successful, the group experienced almost constant creative and personal conflict, and Buckingham left the band in 1987 to focus on his solo career. Hit songs Buckingham wrote and sang with Fleetwood Mac include "Go Your Own Way", "Never Going Back Again", "Tusk", and "Big Love".

A one-off reunion at the 1993 inauguration ball for President Bill Clinton initiated some rapprochement between the former band members, with Buckingham performing some vocals on one track of their 1995 studio album Time, and rejoining the band full-time in 1997 for the live tour and album The Dance. On April 9, 2018, Buckingham was fired from Fleetwood Mac and replaced by Mike Campbell and Neil Finn.