Alison Krauss & Union Station is an American bluegrass and country band associated with singer Alison Krauss. It was initially composed of Krauss, Jeff White, Mike Harman and John Pennell. Later additions included Tim Stafford, Ron Block, Adam Steffey, Barry Bales and Larry Atamanuik. In 1992, Stafford was replaced by guitar and mandolin player Dan Tyminski and in 1998, Steffey left and was replaced by Dobro player Jerry Douglas.

Bluegrass music is a genre of American roots music that developed in the 1940s in the Appalachian region of the United States. The genre derives its name from the band Bill Monroe and the Blue Grass Boys. Like mainstream country music, it largely developed out of old-time string music, though in contrast, it is traditionally played exclusively on acoustic instruments and also has roots in traditional English, Scottish and Irish ballads and dance tunes, as well as in blues and jazz. It was further developed by musicians who played with Monroe, including 5-string banjo player Earl Scruggs and guitarist Lester Flatt. Monroe characterized the genre as "Scottish bagpipes and ole-time fiddlin'. It's a part of Methodist, Holiness and Baptist traditions. It's blues and jazz, and it has a high lonesome sound."