The 1900 Italian Football Championship was the third edition of the Italian Football Championship. Genoa won their third consecutive title.
The competition expanded from previous years to now feature six clubs from three Northern Italian regions. Three Piedmont clubs played a round robin to decide which of the three would play in the final. AC Milan (representing Lombardy), joined as semi-finalist playing the winners of the game between two Liguria clubs.
Milan was the only registered team. The team was admitted directly to Round 2.