Whiteside County's estimated 2026 population is 53,819 with a growth rate of -0.56% in the past year according to the most recent United States census data. Whiteside County is the 25th largest county in Illinois. The 2010 population was 58,489 and has seen a growth of -7.98% since that time.
Data after 2023 is projected based on recent change
Overall: 43 years
Female: 44.5 years
Male: 41.5 years
There are 42,882 adults, (11,967 of whom are seniors) in Whiteside County.
Female: 27,532 (50.1%)
Male: 27,415 (49.9%)
The racial composition of Whiteside County includes 85.12% White, 3.12% other race, and smaller percentages for Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 46,769 | 85.12% |
| Two or more races | 5,273 | 9.6% |
| Other race | 1,714 | 3.12% |
| Black or African American | 691 | 1.26% |
| Asian | 291 | 0.53% |
| Native American | 206 | 0.37% |
| Native Hawaiian or Pacific Islander | 3 | 0.01% |
Whiteside County's average per capita income is $46,426. Household income levels show a median of $67,500. The poverty rate stands at 11.98%.
Name | Median | Mean |
|---|---|---|
| Married Families | $105,683 | $119,427 |
| Families | $86,228 | $102,741 |
| Households | $67,500 | $86,592 |
| Non Families | $38,737 | $53,468 |
Average Income
Median Household Income
Poverty Rate
