The 1988–89 National Football League, known for sponsorship reasons as the Royal Liver National Football League, was the 58th staging of the National Football League (NFL), an annual Gaelic football tournament for the Gaelic Athletic Association county teams of Ireland.
Colman Corrigan was injured in New York and so missed the All-Ireland championship.
2 points were awarded for a win and 1 for a draw.
Teams in all three divisions competed for the National Football League title.
In the event that teams finish on equal points, then a play-off will be used to determine group placings if necessary, i.e. where to decide relegation places or quarter-finalists.