Cook County Board of Commissioners 12th district

The district is located entirely within the municipal boundaries of the city of Chicago.

[2] New boundaries were adopted in August 2001, with redistricting taking place following the 2000 United States Census.

[3] The district's new boundaries still were fully laid within the city of Chicago.

It represented parts of the North and Northwest sides of the city.

[6] The district as redistricted in 2022, following the 2020 United States Census, contains a portion of the city of Chicago.