Piatt County's estimated 2026 population is 16,940 with a growth rate of 0.89% in the past year according to the most recent United States census data. Piatt County is the 61st largest county in Illinois. The 2010 population was 16,710 and has seen a growth of 1.38% since that time.
Data after 2023 is projected based on recent change
Overall: 42.8 years
Female: 44.6 years
Male: 41.7 years
There are 13,087 adults, (3,529 of whom are seniors) in Piatt County.
Female: 8,366 (50.1%)
Male: 8,329 (49.9%)
The racial composition of Piatt County includes 95% White, and smaller percentages for Two or more races, Black or African American, other race, Asian, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 15,860 | 95% |
| Two or more races | 350 | 2.1% |
| Black or African American | 240 | 1.44% |
| Other race | 125 | 0.75% |
| Asian | 106 | 0.63% |
| Native American | 14 | 0.08% |
Piatt County's average per capita income is $56,016. Household income levels show a median of $94,811. The poverty rate stands at 6.14%.
Name | Median | Mean |
|---|---|---|
| Married Families | $115,723 | - |
| Families | $105,216 | $131,109 |
| Households | $94,811 | $113,102 |
| Non Families | $57,264 | $63,532 |
Average Income
Median Household Income
Poverty Rate