DeKalb County's estimated 2025 population is 100,418 with a growth rate of 0.06% 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 -4.5% since that time.
Data after 2023 is projected based on recent change
The racial composition of DeKalb County includes 76.28% White, 7.78% Black or African American, 4.62% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 76,672 | 76.28% |
| Two or more races | 8,772 | 8.73% |
| Black or African American | 7,815 | 7.78% |
| Other race | 4,643 | 4.62% |
| Asian | 2,139 | 2.13% |
| Native American | 440 | 0.44% |
| Native Hawaiian or Pacific Islander | 31 | 0.03% |
Married
Widowed
Divorced
Separated
Never Married
DeKalb County's average per capita income is $49,284. Household income levels show a median of $69,022. The poverty rate stands at 15.92%.
Name | Median | Mean |
|---|---|---|
| Married Families | $114,529 | $128,091 |
| Families | $93,970 | $107,783 |
| Households | $69,022 | $87,946 |
| Non Families | $38,165 | $52,745 |
Average Income
Median Household Income
Poverty Rate
