Plainsong is a body of traditional songs used in the liturgies of the Roman Catholic Church.
Plainsong may also refer to:
Music
- Plainsong (band), a musical group fronted by Iain Matthews
- "Plainsong" (song), track 1 of Disintegration, a 1989 album by the Cure
- "Plainsong", track 5 of Quique, a 1993 album by Seefeel
Novels
- Plainsong, a 1990 novel by Deborah Grabien#Utopian_Fantasy Deborah Grabien
- Plainsong (novel), a 1999 novel by Kent Haruf
- The Fast Red Road, a 2000 novel by Stephen Graham Jones subtitled A Plainsong
Other uses
- Plainsong, a 2004 TV movie starring Aidan Quinn
- Plainsong, home of the Utaru in Horizon Forbidden West (2022)