"A Girl I Used to Know" (also known as "Just Someone I Used to Know" and "Someone I Used to Know") is a song written by Jack Clement and originally released as a single by George Jones.
Porter Wagoner and Dolly Parton recorded the song as "Just Someone I Used to Know", with the single becoming a number nine hit in 1969, and earning a nomination for Best Country Performance by a Duo or Group at the 12th Annual Grammy Awards.
The same year, The Statler Brothers released a version of the song on their album Pictures of Moments to Remember .
Emmylou Harris recorded the song as a duet with John Anderson for her 1986 album Thirteen.
Adam Harvey and Beccy Cole included the song on their 2017 album The Great Country Songbook Volume 2.