Versions
| Title, Format | Label | Cat# | Country | Year | |
|---|---|---|---|---|---|
| The Reason (CD, Enh, Single) | Mercury | 9862567 | Europe | 2004 | |
| The Reason (7") | Mercury | 986 260-3 | UK | 2004 | |
| The Reason (CD, Enh, Promo, Single) | Island Def Jam Music Group | HOOBASTANKCDP2 | Europe | 2004 | |
| The Reason (CD, Single, Car) | Island Records | 602498625095 | Europe | 2004 | |
| The Reason (CD, Single, Enh) | Island Def Jam Music Group | 0602498625088 | Europe | 2004 | |
| The Reason (CD, Single, Enh) | Island Def Jam Music Group | 9862508 | Australasia | 2004 | |
| The Reason (CD, Single, Promo) | Island Def Jam Music Group | REASONCJ2 | UK | 2004 |