Jo Daviess County's 2026 population is estimated at 21,086, reflecting a -1.04% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Jo Daviess County is the 54th largest county in Illinois. The 2010 population was 22,647 and has grown -6.89% since 2010.
Data after 2023 is projected based on recent change
Overall: 51.5 years
Female: 52.9 years
Male: 49.7 years
There are 17,879 adults, (6,541 of whom are seniors) in Jo Daviess County.
Female: 10,923 (50%)
Male: 10,928 (50%)
The racial composition of Jo Daviess County includes 93.52% White, and smaller percentages for other race, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 20,434 | 93.52% |
| Two or more races | 866 | 3.96% |
| Other race | 193 | 0.88% |
| Black or African American | 166 | 0.76% |
| Asian | 118 | 0.54% |
| Native American | 63 | 0.29% |
| Native Hawaiian or Pacific Islander | 11 | 0.05% |
Jo Daviess County 's average per capita income is $48,008. Household income levels show a median of $73,993. The poverty rate stands at 7.84%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $102,519 | - |
| Families | $94,453 | $116,827 |
| Households | $73,993 | $95,031 |
| Non Families | $41,826 | $54,052 |
Average Income
Median Household Income
Poverty Rate
