Cook County Demographics

A map of Cook County's Population by Race

Cook County, Illinois had a population of 5,275,541 in 2020. It was 40.5% White, 22.5% Black, 7.7% Asian, 26.2% Hispanic, 0.5% Native American/Other, and 2.6% Multiracial. This map presents the population of Cook County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Cook County is the most populous county of the 102 counties in Illinois.

Cook County's White Population

2,135,243 residents of Cook County identify as White, or 40.5%. This makes the White share of the population of Cook County less than the White share of the population of Illinois (58.3% White). Of the 102 counties in Illinois, Cook County is ranked #102 in terms of White residents as a share of the population.

Cook County is less White than neighboring Lake County (57.2% White), DuPage County (63.4% White), Lake County (50.4% White), Will County (60.1% White), and Kenosha County (72.1% White).

Cook County's Black Population

1,185,601 residents of Cook County identify as Black, or 22.5%. This makes the Black share of the population of Cook County slightly larger than the Black share of the population of Illinois (13.9% Black). Of the 102 counties in Illinois, Cook County is ranked #4 in terms of Black residents as a share of the population.

Cook County is more Black than neighboring Lake County (6.6% Black), DuPage County (4.7% Black), Will County (11.4% Black), and Kenosha County (6.8% Black). Cook County is less Black than neighboring Lake County (24.3% Black).

Cook County's Asian Population

408,691 residents of Cook County identify as Asian, or 7.7%. This makes the Asian share of the population of Cook County roughly similar to the Asian share of the population of Illinois (5.8% Asian). Of the 102 counties in Illinois, Cook County is ranked #4 in terms of Asian residents as a share of the population.

Cook County is more Asian than neighboring Lake County (1.5% Asian), Will County (6.1% Asian), and Kenosha County (1.7% Asian). Cook County is less Asian than neighboring Lake County (8.2% Asian), and DuPage County (12.8% Asian).

Cook County's Hispanic Population

1,382,778 residents of Cook County identify as Hispanic, or 26.2%. This makes the Hispanic share of the population of Cook County slightly larger than the Hispanic share of the population of Illinois (18.2% Hispanic). Of the 102 counties in Illinois, Cook County is ranked #2 in terms of Hispanic residents as a share of the population.

Cook County is more Hispanic than neighboring Lake County (24.1% Hispanic), DuPage County (15.5% Hispanic), Lake County (20% Hispanic), Will County (18.8% Hispanic), and Kenosha County (14.5% Hispanic).

Cook County's Native American/Other Population

27,154 residents of Cook County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.5%. This makes the Native American/Other share of the population of Cook County roughly similar to the Native American/Other share of the population of Illinois (0.5% Native American/Other). Of the 102 counties in Illinois, Cook County is ranked #29 in terms of Native American/Other residents as a share of the population.

Cook County is more Native American/Other than neighboring Will County (0.4% Native American/Other). Cook County is less Native American/Other than neighboring Lake County (0.6% Native American/Other), and Kenosha County (0.6% Native American/Other).

Cook County's Multiracial Population

136,074 residents of Cook County identify as Multiracial, or 2.6%. This makes the Multiracial share of the population of Cook County roughly similar to the Multiracial share of the population of Illinois (3.2% Multiracial). Of the 102 counties in Illinois, Cook County is ranked #90 in terms of Multiracial residents as a share of the population.

Cook County is less Multiracial than neighboring Lake County (3.3% Multiracial), DuPage County (3.2% Multiracial), Lake County (3.4% Multiracial), Will County (3.2% Multiracial), and Kenosha County (4.4% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.