| Founded | 1964 |
|---|---|
| Folded | 2000 |
| Country |  Ireland |
| Level on pyramid | 2 (1964–1985) 3 (1985–2005) |
| Domestic cup(s) | FAI Cup FAI Intermediate Cup |
| League cup(s) | Blackthorn Trophy See Note 1 Castrol Trophy Egan C&C Trophy |
The League of Ireland B Division is a former league within the Republic of Ireland football league system. Its debut season was 1964–65. It was originally a second level league. However following the emergence of the League of Ireland First Division in 1985–86 it became a third level league. Like the later A Championship, the League of Ireland B included a mixture of League of Ireland reserve teams and the first teams of emerging clubs. There was no relegation and promotion to and from the senior League of Ireland division. However a number of B Division teams, including Home Farm, Athlone Town, UCD, Longford Town and Monaghan United, were subsequently elected to the senior division. In later seasons the league was usually referred to as the Reserve Division. In 2000 it was replaced by the League of Ireland U21 Division.[1]