Oak Brook, IL Demographics

A map of Oak Brook's Population by Race

Oak Brook, Illinois has an estimated population of 8,056, a slight decrease from the 8,163 recorded in the 2020 Census. The population is 59.3% White, 32.7% Asian, 5.7% Hispanic, 1.6% Multiracial, 0.3% Black, and 0.3% Native American/Other. This demographic dot map shows the population of Oak Brook, with one dot drawn for each person counted by the Census, color-coded by race.

Oak Brook has become less racially diverse since the 2020 Census. It is considerably less diverse than Illinois overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Oak Brook, that probability was 56.5% in 2020 and 53.8% in the most recent ACS estimates.

Oak Brook is ranked the 262nd most populous place in Illinois, out of 1,461 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Oak Brook was ranked the 262nd most populous place in the 2020 Census.

Oak Brook's White Population

4,775 residents of Oak Brook, or 59.3% of the population, identify as White. The share of White residents in Oak Brook is comparable to the share in Illinois overall, where 58.1% of the population is White. Oak Brook ranks 1320th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oak Brook's White population has grown by an estimated 2.7%. White residents' share of Oak Brook's population has increased from 56.9% to 59.3%.

Oak Brook is more White than neighboring Oakbrook Terrace (57.2% White). Oak Brook is less White than neighboring Clarendon Hills (78.8% White), Hinsdale (72.7% White), Westmont (61.7% White), and Villa Park (63.9% White).

Oak Brook's Black Population

26 residents of Oak Brook, or 0.3% of the population, identify as Black. The share of Black residents in Oak Brook is considerably lower than in Illinois overall, where 13.3% of the population is Black. Oak Brook ranks 391st statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oak Brook's Black population has declined by an estimated 82.6%. Black residents' share of Oak Brook's population has decreased from 1.8% to 0.3%.

Oak Brook is less Black than neighboring Oakbrook Terrace (20.3% Black), Clarendon Hills (0.4% Black), Hinsdale (1.5% Black), Westmont (5.9% Black), and Villa Park (3.5% Black).

Oak Brook's Asian Population

2,637 residents of Oak Brook, or 32.7% of the population, identify as Asian. The share of Asian residents in Oak Brook is significantly higher than in Illinois overall, where 5.9% of the population is Asian. Oak Brook ranks 3rd statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oak Brook's Asian population has declined by an estimated 1.5%. Asian residents' share of Oak Brook's population has remained roughly unchanged at 32.7%.

Oak Brook is more Asian than neighboring Oakbrook Terrace (10.8% Asian), Clarendon Hills (9.8% Asian), Hinsdale (13.7% Asian), Westmont (14.6% Asian), and Villa Park (3.3% Asian).

Oak Brook's Hispanic Population

463 residents of Oak Brook, or 5.7% of the population, identify as Hispanic. The share of Hispanic residents in Oak Brook is considerably lower than in Illinois overall, where 18.8% of the population is Hispanic. Oak Brook ranks 516th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oak Brook's Hispanic population has grown by an estimated 16.9%. Hispanic residents' share of Oak Brook's population has increased from 4.9% to 5.7%.

Oak Brook is less Hispanic than neighboring Oakbrook Terrace (8.5% Hispanic), Clarendon Hills (6.7% Hispanic), Hinsdale (5.9% Hispanic), Westmont (14.2% Hispanic), and Villa Park (24.9% Hispanic).

Oak Brook's Native American/Other Population

23 residents of Oak Brook, or 0.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Oak Brook is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Oak Brook ranks 410th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oak Brook's Native American/Other population has declined by an estimated 51.1%. Native American/Other residents' share of Oak Brook's population has remained roughly unchanged at 0.3%.

Oak Brook is more Native American/Other than neighboring Oakbrook Terrace (0% Native American/Other), and Villa Park (0% Native American/Other). Oak Brook is less Native American/Other than neighboring Clarendon Hills (0.5% Native American/Other), Hinsdale (1.3% Native American/Other), and Westmont (0.6% Native American/Other).

Oak Brook's Multiracial Population

132 residents of Oak Brook, or 1.6% of the population, identify as Multiracial. The share of Multiracial residents in Oak Brook is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Oak Brook ranks 935th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oak Brook's Multiracial population has declined by an estimated 46.1%. Multiracial residents' share of Oak Brook's population has decreased from 3.0% to 1.6%.

Oak Brook is less Multiracial than neighboring Oakbrook Terrace (3.1% Multiracial), Clarendon Hills (3.8% Multiracial), Hinsdale (4.8% Multiracial), Westmont (2.9% Multiracial), and Villa Park (4.4% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.