County in Illinois · 468 sq mi · 27 people per sq mi
12,741 people live in Clay County. The typical household earns $60,417, and the median resident is 40.4 years old.
2026 projection
From 13,271 in 2020
Poverty rate 17.51%
Men 39.8 · Women 40.9
1830–2026
12,741
2026 projection
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.
1830–2026
12,741
2026 projection
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 | 12,741 | -52 | 0.41% |
|---|---|---|---|
| 2025 | 12,793 | -52 | 0.40% |
| 2024 | 12,845 | -103 | 0.80% |
| 2023 | 12,948 | -101 | 0.77% |
| 2022 | 13,049 | -114 | 0.87% |
| 2021 | 13,163 | -108 | 0.81% |
| 2020 | 13,271 | +94 | 0.71% |
| 2019 | 13,177 | -83 | 0.63% |
| 2018 | 13,260 | +1 | 0.01% |
| 2017 | 13,259 | -50 | 0.38% |
Showing 10 of 34 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 131 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 6 residents
49% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 49% | 49% | 49% |
| Never married | 26% | 29% | 23% |
| Divorced | 15% | 15% | 15% |
| Widowed | 9% | 4% | 14% |
| Separated | 2% | 3% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
8 sources, all from the U.S. Census Bureau