| Jason Isbell and the 400 Unit | |
| Type: | studio |
| Artist: | Jason Isbell |
| Cover: | JIsbell400 ST2009.jpg |
| Released: | February 17, 2009 |
| Genre: | Americana, Folk |
| Label: | Lightning Rod |
| Prev Title: | Sirens of the Ditch |
| Prev Year: | 2007 |
| Next Title: | Here We Rest |
| Next Year: | 2011 |
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.