The 1904 Chicago Cubs season was the 33rd season of the Chicago Cubs franchise, the 29th in the National League, and the 12th at West Side Park. The Cubs finished second in the National League with a record of 93–60.

Frank Gibson Selee was an American Major League Baseball manager in the National League (NL). In his 16-year Major League career, he managed the Boston Beaneaters (1890–1901) and Chicago Orphans / Cubs (1902–1905), winning 1,284 games. Selee managed the Beaneaters during their 1890s run of five NL championships. His 1892 and 1898 teams each won 100 games, becoming the first teams to ever achieve the mark in baseball history ; their 102 wins in each season would not be surpassed by a National League team until 1902. After joining the Orphans, he helped build the team that would become the Cubs dynasty of the 1900s. He was elected to the National Baseball Hall of Fame in 1999.