The 1906 Chicago Cubs season was the 35th season of the Chicago Cubs franchise, the 31st in the National League and the 14th at West Side Park. The team won the National League pennant with a record of 116–36, a full 20 games ahead of the second-place New York Giants. The team's 116 wins is still the most by any team in National League history. The team's .763 winning percentage is still the highest in modern MLB history (i.e., since 1901).