| Competition: | Prima Categoria |
| Season: | 1905–06 |
| Winners: | Milan 2nd title |
| Matches: | 12 |
| Total Goals: | 31 |
| Prevseason: | 1905 |
| Nextseason: | 1907 |
The 1906 Prima Categoria season was won by Milan.
Juventus was the only registered team.
Played on 7 January and 14 January|}
Played on 7 January and 14 January|}
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(*) The match was suspended on 1–0 and repeated in a neutral ground.
Played in Turin on 29 April|}
Milan was declared champion.