| Season | 1905 | |||
|---|---|---|---|---|
| Primera División | Alumni | |||
| Segunda División | América | |||
| Tercera División | Alumni III | |||
| Copa de Honor | Alumni | |||
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1905 in Argentine football saw Alumni crowning Argentine champion, winning its 5th league title in six seasons. A new team, Reformer Athletic Club from the city of Campana, registered to play the tournament.
The 1905 championship was expanded to include 7 teams, who played in a league format, with each team playing the other twice.