The Chicago City League was a minor league baseball league based in Chicago, Illinois. The Independent level league played with teams based entirely in Chicago. The league played in 1887, from 1890 to 1894 and 1909 to 1910 as a minor league. In the era of segregated baseball, the 1909 and 1910 leagues were integrated, with the Leland Giants joining as a member.

The Chicago City League began minor league play in 1887. The 1887 league member teams are unknown.

The 1890 Chicago City League played with six team members. The Chicago Brands, Chicago Franklins, Chicago Garden Citys, Chicago Rivals, Chicago West Ends and Chicago Whitings were the six league franchises. Records and standings are unknown.

The Chicago City League continued play in 1891 with the same six franchises remaining.

The 1892 Chicago City League added two teams. The 1892 league members were the Chicago Brands, Chicago Crystals, Chicago Franklins, Chicago Garden Citys, Chicago Lake Views, Chicago Rivals, Chicago West Ends and Chicago Whitings.

The same eight teams continued Chicago City League play in the 1893 season.

The 1894 Chicago City League reduced to six teams. The 1894 league played with the Chicago Brands, Chicago Franklins, Chicago Garden Citys, Chicago Lake Views, Chicago Rivals and Chicago Whitings as the member teams. The Chicago City League disbanded after the season, in part because the league's better teams could schedule games independently and make more profit.

The Leland Giants played regular exhibition games against Chicago City League teams, integrating the league games.