2004–05 Luxembourg National Division

After calculating the final results after 28 games, F91 Dudelange, the top team in the title group, was declared the league champion.

The fourth-placed team in each of the relegation groups (Union Luxembourg and CA Spora Luxembourg in groups A and B respectively) was relegated to the Division of Honour.

This format is no longer used; the current season, 2006–07 uses a straightforward round-robin.

Luxembourg was assigned one spot in the first qualifying round of the UEFA Champions League, for the league champions; it was also assigned two spots in the first qualifying round of the UEFA Cup, for the runners-up and the winners of the Luxembourg Cup.

The champions and runners-up of the Division of Honour, UN Käerjeng 97 and US Rumelange, were promoted automatically.