Cook County, IL Demographics

The total population of Cook County is estimated to be 5.23 million with 2.55 million males (48.89%) and 2.67 million females (51.11%). There are 116,085 more females than males in Cook County.
The median household income in Cook County was $77,956 in 2021, which marked an an increase of 1,032(1.34%) from $76,924 in 2020. This income is 104.49% of the U.S. median household income of $74,606 (all incomes in 2022 inflation-adjusted dollars).
Per the latest American Community Survey by the Census Bureau, Cook County sees its highest median household income among householders in the age group of 25 to 44 years old, at $88,276. Overall, the median household income for the county of Cook County stands at $76,632.
In Cook County, the median income for all workers aged 15 years and older, regardless of work hours, was $47,805 for males and $35,664 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $69,209 for males and $59,468 for females.
In Cook County, the demographic landscape is diverse, spanning 7 distinct racial categories among households. Among these, White households have the highest median household income at $94,539, while Black or African American households represent the opposite end with the lowest median household income of $46,045.
In 2022, the population of Cook County was 5,109,292, a 1.32% decrease year-by-year from 2021. Previously, in 2021, Cook County's population was 5,177,606, a decline of 1.59% compared to a population of 5,261,249 in 2020.
The median age in Cook County, IL is 37.3, as per 2021 ACS 5-Year Estimates. Of the total population, 18.15% were under the age of 15, 20.52% aged 15 to 29, 46.63% aged 30 to 64, 12.80% aged 65 to 84, and 1.90% were 85 years of age and older.
Racial distribution of Cook County population: 52.04% are White, 23% are Black or African American, 0.43% are American Indian and Alaska Native, 7.54% are Asian, 0.04% are Native Hawaiian and other Pacific Islander, 9.94% are some other race and 7% are multiracial.