Inter are 15th in European clubs for aggregate home attendances in 2016-17, the only Italian side in the top 20.
The Nerazzurri, who share the Stadio Giuseppe Meazza with Milan, had an average of 46,622 spectators at their home league games.
In total, their matches brought in 885,818 people to San Siro.
While Inter are 15th, the top side was Barcelona, with an average of 78,034 at Camp Nou, followed by Manchester United with 75,290.
Borussia Dortmund followed with 79,653 and Real Madrid with an average of 69,426.
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