U.F.O.F. is the third studio album by the American band Big Thief, released through 4AD on May 3, 2019.

The album was recorded in June 2018 at Bear Creek Studio, a secluded studio with lush nature surroundings in Woodinville, Washington. The songs "From" and "Terminal Paradise" previously appeared in a different form on Adrianne Lenker's 2018 solo album Abysskiss. The title initials stand for "UFO friend", according to lyrics in the title track. The album received acclaim from music critics and was nominated for Best Alternative Music Album at the 62nd Annual Grammy Awards.

Five months after the album's release, Big Thief released their fourth studio album, Two Hands. Described as the "earth twin" to U.F.O.F., it was recorded at Sonic Ranch in the Chihuahuan Desert of Texas days after the band completed recording for U.F.O.F. in Washington.