Jason Isbell and the 400 Unit is Jason Isbell's second full-length album, and first album with the 400 Unit as accompanying band.

It was released on February 17, 2009, through Lightning Rod Records.

The deluxe version of the album contains an additional four tracks.

On October 18, 2019, the album was re-released with remixing done by Dave Cobb and remastering done by Pete Lyman.

Jason Isbell and the 400 Units Additional contributors This 2009 rock album–related article is a stub.