Jersey County's 2026 population is estimated at 21,165, reflecting a 0.02% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Jersey County is the 54th largest county in Illinois. The 2010 population was 22,997 and has grown -7.97% since 2010.
Overall: 43.7 years
Female: 44.4 years
Male: 42.7 years
There are 17,067 adults, (4,391 of whom are seniors) in Jersey County.
Female: 10,892 (51.2%)
Male: 10,382 (48.8%)
The racial composition of Jersey County includes 94.94% White, and smaller percentages for Asian, Black or African American, other race, Native Hawaiian or Pacific Islander, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 20,197 | 94.94% |
| Two or more races | 724 | 3.4% |
| Asian | 143 | 0.67% |
| Black or African American | 118 | 0.55% |
| Other race | 65 | 0.31% |
| Native Hawaiian or Pacific Islander | 22 | 0.1% |
| Native American | 5 | 0.02% |
Jersey County 's average per capita income is $50,303. Household income levels show a median of $80,361. The poverty rate stands at 8.83%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $108,310 | - |
| Families | $97,951 | $120,229 |
| Households | $80,361 | $98,416 |
| Non Families | $38,482 | $51,058 |
Average Income
Median Household Income
Poverty Rate