Mason County's estimated 2026 population is 12,333 with a growth rate of -0.63% 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 -15.82% since that time.
Data after 2023 is projected based on recent change
Overall: 45.4 years
Female: 45.9 years
Male: 44.6 years
There are 10,098 adults, (2,939 of whom are seniors) in Mason County.
Female: 6,414 (50.3%)
Male: 6,331 (49.7%)
The racial composition of Mason County includes 94.61% White, and smaller percentages for Black or African American, other race, Native American, Asian and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 12,058 | 94.61% |
| Two or more races | 418 | 3.28% |
| Black or African American | 96 | 0.75% |
| Other race | 67 | 0.53% |
| Native American | 54 | 0.42% |
| Asian | 52 | 0.41% |
Mason County's average per capita income is $43,872. Household income levels show a median of $62,845. The poverty rate stands at 14.83%.
Name | Median | Mean |
|---|---|---|
| Married Families | $94,653 | - |
| Families | $79,716 | $91,925 |
| Households | $62,845 | $78,083 |
| Non Families | $37,473 | $52,944 |
Average Income
Median Household Income
Poverty Rate
