DeKalb County's estimated 2026 population is 103,049 with a growth rate of 1.19% in the past year according to the most recent United States census data. DeKalb County is the 19th largest county in Illinois. The 2010 population was 105,151 and has seen a growth of -2% since that time.
Data after 2023 is projected based on recent change
Overall: 32.7 years
Female: 32.8 years
Male: 32.4 years
There are 78,980 adults, (14,020 of whom are seniors) in DeKalb County.
Female: 50,679 (50.3%)
Male: 50,024 (49.7%)
The racial composition of DeKalb County includes 74.16% White, 7.01% Black or African American, 5.33% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 74,678 | 74.16% |
| Two or more races | 10,589 | 10.52% |
| Black or African American | 7,056 | 7.01% |
| Other race | 5,363 | 5.33% |
| Asian | 2,331 | 2.31% |
| Native American | 658 | 0.65% |
| Native Hawaiian or Pacific Islander | 28 | 0.03% |
DeKalb County's average per capita income is $50,637. Household income levels show a median of $70,724. The poverty rate stands at 14.8%.
Name | Median | Mean |
|---|---|---|
| Married Families | $118,045 | $134,322 |
| Families | $97,889 | $112,273 |
| Households | $70,724 | $90,834 |
| Non Families | $40,587 | $54,024 |
Average Income
Median Household Income
Poverty Rate
