Cass County's estimated 2026 population is 12,581 with a growth rate of -0.52% in the past year according to the most recent United States census data. Cass County is the 80th largest county in Illinois. The 2010 population was 13,632 and has seen a growth of -7.71% since that time.
Data after 2023 is projected based on recent change
The racial composition of Cass County includes 77.69% White, 8.69% other race, 3.81% Black or African American, and smaller percentages for Asian, Native Hawaiian or Pacific Islander, Native American and multiracial populations.
White (77.69%)
Other race (8.69%)
Two or more races (7.95%)
Black or African American (3.81%)
Asian (0.8%)
Native Hawaiian or Pacific Islander (0.58%)
Native American (0.47%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 9,965 | 77.69% |
| Other race | 1,115 | 8.69% |
| Two or more races | 1,020 | 7.95% |
| Black or African American | 489 | 3.81% |
| Asian | 102 | 0.8% |
| Native Hawaiian or Pacific Islander | 75 | 0.58% |
| Native American | 60 | 0.47% |
Married
Widowed
Divorced
Separated
Never Married
Cass County's average per capita income is $44,965. Household income levels show a median of $64,907. The poverty rate stands at 10.9%.
Name | Median | Mean |
|---|---|---|
| Married Families | $84,177 | - |
| Families | $76,426 | $91,797 |
| Households | $64,907 | $78,834 |
| Non Families | $38,434 | $49,980 |
Average Income
Median Household Income
Poverty Rate
