County in Illinois · 370 sq mi · 57 people per sq mi
21,165 people live in Jersey County. The typical household earns $80,361, and the median resident is 43.7 years old.
2026 projection
From 21,493 in 2020
Poverty rate 8.83%
Men 42.7 · Women 44.4
1840–2026
21,165
2026 projection
1.5% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1840–2026
21,165
2026 projection
1.5% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 21,165 | +5 | 0.02% |
|---|---|---|---|
| 2025 | 21,160 | +5 | 0.02% |
| 2024 | 21,155 | -13 | 0.06% |
| 2023 | 21,168 | -54 | 0.25% |
| 2022 | 21,222 | -141 | 0.66% |
| 2021 | 21,363 | -130 | 0.60% |
| 2020 | 21,493 | -174 | 0.80% |
| 2019 | 21,667 | -71 | 0.33% |
| 2018 | 21,738 | -154 | 0.70% |
| 2017 | 21,892 | -73 | 0.33% |
Showing 10 of 33 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 213 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 11 residents
48% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 48% | 50% | 46% |
| Never married | 33% | 35% | 30% |
| Divorced | 11% | 11% | 11% |
| Widowed | 8% | 4% | 11% |
| Separated | <1% | <1% | 1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
8 sources, all from the U.S. Census Bureau