DeKalb County, IL Demographics

The total population of DeKalb County is estimated to be 100,686 with 50,029 males (49.69%) and 50,657 females (50.31%). There are 628 more females than males in DeKalb County.
The median household income in DeKalb County was $69,199 in 2021, which marked an a decrease of 1,456(2.06%) from $70,655 in 2020. This income is 92.75% 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, DeKalb County sees its highest median household income among householders in the age group of 45 to 64 years old, at $90,594. Overall, the median household income for the county of DeKalb County stands at $68,590.
In DeKalb County, the median income for all workers aged 15 years and older, regardless of work hours, was $47,206 for males and $24,544 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $64,431 for males and $48,106 for females.
In DeKalb County, the demographic landscape is diverse, spanning 4 distinct racial categories among households. Among these, American Indian and Alaska Native households have the highest median household income at $120,758, while Black or African American households represent the opposite end with the lowest median household income of $24,207.
In 2022, the population of DeKalb County was 100,232, a 0.24% decrease year-by-year from 2021. Previously, in 2021, DeKalb County's population was 100,472, an increase of 0.22% compared to a population of 100,253 in 2020.
The median age in DeKalb County, IL is 31.4, as per 2021 ACS 5-Year Estimates. Of the total population, 17.96% were under the age of 15, 30.03% aged 15 to 29, 39.37% aged 30 to 64, 11.16% aged 65 to 84, and 1.48% were 85 years of age and older.
Racial distribution of DeKalb County population: 81.08% are White, 7.89% are Black or African American, 0.20% are American Indian and Alaska Native, 2.29% are Asian, 0.03% are Native Hawaiian and other Pacific Islander, 3.82% are some other race and 4.69% are multiracial.