County in Illinois · 501 sq mi · 30 people per sq mi
15,087 people live in Clark County. The typical household earns $72,927, and the median resident is 42.6 years old.
2026 projection
From 15,456 in 2020
Poverty rate 9.15%
Men 40.8 · Women 43.8
1820–2026
15,087
2026 projection
2.4% 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.
1820–2026
15,087
2026 projection
2.4% 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 | 15,087 | -27 | 0.18% |
|---|---|---|---|
| 2025 | 15,114 | -27 | 0.18% |
| 2024 | 15,141 | -94 | 0.62% |
| 2023 | 15,235 | +17 | 0.11% |
| 2022 | 15,218 | -166 | 1.08% |
| 2021 | 15,384 | -72 | 0.47% |
| 2020 | 15,456 | -9 | 0.06% |
| 2019 | 15,465 | -129 | 0.83% |
| 2018 | 15,594 | -230 | 1.45% |
| 2017 | 15,824 | -36 | 0.23% |
Showing 10 of 35 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 153 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
55% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 55% | 57% | 54% |
| Never married | 25% | 27% | 22% |
| Divorced | 11% | 11% | 11% |
| Widowed | 7% | 4% | 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