Marshall County's estimated 2026 population is 11,375 with a growth rate of -0.85% in the past year according to the most recent United States census data. Marshall County is the 84th largest county in Illinois. The 2010 population was 12,637 and has seen a growth of -9.99% since that time.
Data after 2023 is projected based on recent change
Overall: 46.1 years
Female: 46.6 years
Male: 44.9 years
There are 9,269 adults, (2,800 of whom are seniors) in Marshall County.
Female: 5,817 (49.9%)
Male: 5,830 (50.1%)
The racial composition of Marshall County includes 92.83% White, and smaller percentages for other race, Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 10,812 | 92.83% |
| Two or more races | 570 | 4.89% |
| Other race | 193 | 1.66% |
| Black or African American | 47 | 0.4% |
| Native American | 13 | 0.11% |
| Asian | 10 | 0.09% |
| Native Hawaiian or Pacific Islander | 2 | 0.02% |
Marshall County's average per capita income is $48,765. Household income levels show a median of $71,585. The poverty rate stands at 11.43%.
Name | Median | Mean |
|---|---|---|
| Married Families | $96,336 | - |
| Families | $89,890 | $99,457 |
| Households | $71,585 | $85,623 |
| Non Families | $36,365 | $52,659 |
Average Income
Median Household Income
Poverty Rate
