County in Illinois · 542 sq mi · 30 people per sq mi
16,328 people live in Warren County. The typical household earns $67,385, and the median resident is 38.5 years old.
2026 projection
From 16,837 in 2020
Poverty rate 14.63%
Men 36.7 · Women 40.5
1830–2026
16,328
2026 projection
3% 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.
1830–2026
16,328
2026 projection
3% 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 | 16,328 | +106 | 0.65% |
|---|---|---|---|
| 2025 | 16,222 | +106 | 0.66% |
| 2024 | 16,116 | -43 | 0.27% |
| 2023 | 16,159 | -119 | 0.73% |
| 2022 | 16,278 | -344 | 2.07% |
| 2021 | 16,622 | -215 | 1.28% |
| 2020 | 16,837 | +21 | 0.12% |
| 2019 | 16,816 | -163 | 0.96% |
| 2018 | 16,979 | -154 | 0.90% |
| 2017 | 17,133 | -150 | 0.87% |
Showing 10 of 34 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 164 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 7 residents
49% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 49% | 51% | 46% |
| Never married | 34% | 37% | 32% |
| Divorced | 9% | 8% | 10% |
| Widowed | 6% | 3% | 10% |
| Separated | 2% | <1% | 3% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
8 sources, all from the U.S. Census Bureau