County in Illinois · 439 sq mi · 39 people per sq mi
16,940 people live in Piatt County. The typical household earns $94,811, and the median resident is 42.8 years old.
2026 projection
From 16,688 in 2020
Poverty rate 6.14%
Men 41.7 · Women 44.6
1850–2026
16,940
2026 projection
1.5% since 2020 (increase)
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.
1850–2026
16,940
2026 projection
1.5% since 2020 (increase)
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 | 16,940 | +149 | 0.89% |
|---|---|---|---|
| 2025 | 16,791 | +149 | 0.90% |
| 2024 | 16,642 | -94 | 0.56% |
| 2023 | 16,736 | +54 | 0.32% |
| 2022 | 16,682 | -88 | 0.52% |
| 2021 | 16,770 | +82 | 0.49% |
| 2020 | 16,688 | +297 | 1.81% |
| 2019 | 16,391 | +16 | 0.10% |
| 2018 | 16,375 | -52 | 0.32% |
| 2017 | 16,427 | -84 | 0.51% |
Showing 10 of 32 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 167 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 16 residents
61% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 61% | 61% | 61% |
| Never married | 23% | 26% | 20% |
| Divorced | 10% | 9% | 11% |
| Widowed | 6% | 3% | 8% |
| Separated | <1% | <1% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
8 sources, all from the U.S. Census Bureau