Jeffrey Davies (born 1967 in Washington, D.C.) is an American rock musician best known as the original lead guitarist of the psychedelic rock band The Brian Jonestown Massacre. He played in the band from 1992 to 1999. He rejoined the band in 2001 only to quit again in 2003. Spending much of his early years in Washington D.C., Davies' family moved to New Mexico where he spent his teen years before eventually moving to San Francisco. While in San Francisco he would become a member of The Brian Jonestown Massacre, replacing Patrick Straczek appearing on the majority of their recordings.
He is featured in the film DiG! about The Brian Jonestown Massacre and their love/hate relationship with The Dandy Warhols.