Piatt County's estimated 2026 population is 16,444 with a growth rate of -0.56% in the past year according to the most recent United States census data. Piatt County is the 63rd largest county in Illinois. The 2010 population was 16,710 and has seen a growth of -1.59% since that time.
Data after 2023 is projected based on recent change
The racial composition of Piatt County includes 95.62% White, and smaller percentages for Two or more races, Black or African American, other race, Asian, Native American and multiracial populations.
White (95.62%)
Two or more races (2.25%)
Black or African American (1.59%)
Other race (0.28%)
Asian (0.19%)
Native American (0.07%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 15,970 | 95.62% |
| Two or more races | 376 | 2.25% |
| Black or African American | 266 | 1.59% |
| Other race | 46 | 0.28% |
| Asian | 32 | 0.19% |
| Native American | 12 | 0.07% |
Married
Widowed
Divorced
Separated
Never Married
Piatt County's average per capita income is $52,831. Household income levels show a median of $87,516. The poverty rate stands at 5.94%.
Name | Median | Mean |
|---|---|---|
| Married Families | $108,508 | - |
| Families | $98,731 | $123,612 |
| Households | $87,516 | $106,362 |
| Non Families | $51,833 | $58,385 |
Average Income
Median Household Income
Poverty Rate