Location of teams in Belgian First Division 1904–05
This season saw the two Groups merged back into one National Division: this was also the last season before promotion and relegation was introduced with the creation of the "Promotion" Division.
It was contested by 11 teams, and Union Saint-Gilloise won the championship.[1]
^At the score of 2–2 interrupted due to the onset of darkness. Since Léopold refused to continue the game, the match was rated as a 5–0 win for Verviers.