Mason County's estimated 2025 population is 12,171 with a growth rate of -1.43% in the past year according to the most recent United States census data. Mason County is the 82nd largest county in Illinois. The 2010 population was 14,651 and has seen a growth of -16.93% since that time.
Data after 2023 is projected based on recent change
The racial composition of Mason County includes 96.04% White, and smaller percentages for Two or more races, Black or African American, other race, Native American, Asian and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 12,368 | 96.04% |
| Two or more races | 313 | 2.43% |
| Black or African American | 113 | 0.88% |
| Other race | 44 | 0.34% |
| Native American | 25 | 0.19% |
| Asian | 15 | 0.12% |
Married
Widowed
Divorced
Separated
Never Married
Mason County's average per capita income is $41,190. Household income levels show a median of $62,127. The poverty rate stands at 14.02%.
Name | Median | Mean |
|---|---|---|
| Married Families | $94,926 | - |
| Families | $80,426 | $93,759 |
| Households | $62,127 | $78,688 |
| Non Families | $39,461 | $52,413 |
Average Income
Median Household Income
Poverty Rate
