The 1885 Chicago White Stockings season was the 14th season of the Chicago White Stockings franchise, the tenth in the National League and the first at the first West Side Park. The White Stockings won the National League pennant for the first time since 1882, beating the New York Giants by two games. They went on to face the St. Louis Browns in the 1885 World Series. The series ended without a champion, with both teams winning three games with one tie.

The 1885 St. Louis Browns season was the team's fourth season in St. Louis, Missouri, and the fourth season in the American Association. The Browns went 79–33 during the season, best in the American Association, and won their first AA pennant. In the World Series, the Browns played the National League champion Chicago White Stockings. The series ended in dispute, with each club winning 3 games with 1 tie.