DeKalb County Demographics

A map of DeKalb County's Population by Race

DeKalb County, Illinois had a population of 100,420 in 2020. It was 71.0% White, 8.7% Black, 2.3% Asian, 13.5% Hispanic, 0.4% Native American/Other, and 4.1% Multiracial. This map presents the population of DeKalb County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

DeKalb County is the 20th most populous county of the 102 counties in Illinois.

DeKalb County's White Population

71,249 residents of DeKalb County identify as White, or 71.0%. This makes the White share of the population of DeKalb County larger than the White share of the population of Illinois (58.3% White). Of the 102 counties in Illinois, DeKalb County is ranked #85 in terms of White residents as a share of the population.

DeKalb County is more White than neighboring Kane County (54.7% White), Boone County (68.6% White), and Kendall County (64.2% White). DeKalb County is less White than neighboring McHenry County (76.9% White), and Lee County (83.3% White).

DeKalb County's Black Population

8,730 residents of DeKalb County identify as Black, or 8.7%. This makes the Black share of the population of DeKalb County slightly less than the Black share of the population of Illinois (13.9% Black). Of the 102 counties in Illinois, DeKalb County is ranked #21 in terms of Black residents as a share of the population.

DeKalb County is more Black than neighboring Kane County (5.1% Black), Boone County (2.2% Black), Kendall County (7.4% Black), McHenry County (1.3% Black), and Lee County (5.4% Black).

DeKalb County's Asian Population

2,280 residents of DeKalb County identify as Asian, or 2.3%. This makes the Asian share of the population of DeKalb County roughly similar to the Asian share of the population of Illinois (5.8% Asian). Of the 102 counties in Illinois, DeKalb County is ranked #14 in terms of Asian residents as a share of the population.

DeKalb County is more Asian than neighboring Boone County (1.2% Asian), and Lee County (0.7% Asian). DeKalb County is less Asian than neighboring Kane County (4.1% Asian), Kendall County (3.5% Asian), and McHenry County (2.8% Asian).

DeKalb County's Hispanic Population

13,597 residents of DeKalb County identify as Hispanic, or 13.5%. This makes the Hispanic share of the population of DeKalb County roughly similar to the Hispanic share of the population of Illinois (18.2% Hispanic). Of the 102 counties in Illinois, DeKalb County is ranked #12 in terms of Hispanic residents as a share of the population.

DeKalb County is more Hispanic than neighboring Lee County (6.8% Hispanic). DeKalb County is less Hispanic than neighboring Kane County (32.8% Hispanic), Boone County (24.1% Hispanic), Kendall County (20.6% Hispanic), and McHenry County (15.1% Hispanic).

DeKalb County's Native American/Other Population

446 residents of DeKalb County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.4%. This makes the Native American/Other share of the population of DeKalb 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, DeKalb County is ranked #43 in terms of Native American/Other residents as a share of the population.

DeKalb County is less Native American/Other than neighboring Boone County (0.5% Native American/Other), and Kendall County (0.5% Native American/Other).

DeKalb County's Multiracial Population

4,118 residents of DeKalb County identify as Multiracial, or 4.1%. This makes the Multiracial share of the population of DeKalb County roughly similar to the Multiracial share of the population of Illinois (3.2% Multiracial). Of the 102 counties in Illinois, DeKalb County is ranked #22 in terms of Multiracial residents as a share of the population.

DeKalb County is more Multiracial than neighboring Kane County (2.9% Multiracial), Boone County (3.4% Multiracial), Kendall County (3.9% Multiracial), McHenry County (3.5% Multiracial), and Lee County (3.4% Multiracial).

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