Leinster ( ; Irish : Laighin , ) , one of the Provinces of Ireland , lies in the east of Ireland and comprises the counties of Carlow , Dublin , Kildare , Kilkenny , Laois , Longford , Louth , Meath , Offaly , Westmeath , Wexford and Wicklow . It lies in the east of Ireland and comprises the counties of Carlow , Dublin , Kildare , Kilkenny , Laois , Longford , Louth , Meath , Offaly , Westmeath , Wexford and Wicklow .