The Reason is the second studio album by American rock band Hoobastank, released on December 9, 2003 by Island Records.

Despite receiving mixed reviews from critics, The Reason peaked at number three on the US Billboard 200 and was eventually certified double platinum by the Recording Industry Association of America; currently, it has sold over 2.3 million copies in the United States alone.

Estrin had recovered by October and the band headed off on a Nokia Unwired Tour with the All-American Rejects and Ozomatli in November.

The Reason eventually reached a peak of number three on the Billboard 200, making it the band's highest-charting album in the United States.

All lyrics are written by Doug Robb; all music is composed by Daniel EstrinAdapted from the album's liner notes.