Marshall County's estimated 2026 population is 11,356 with a growth rate of -0.86% 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 -10.14% since that time.
Data after 2023 is projected based on recent change
The racial composition of Marshall County includes 93.73% White, and smaller percentages for other race, Black or African American, Asian, Native Hawaiian or Pacific Islander, Native American and multiracial populations.
White (93.73%)
Two or more races (4.38%)
Other race (1.3%)
Black or African American (0.42%)
Asian (0.11%)
Native Hawaiian or Pacific Islander (0.05%)
Native American (0.01%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 10,981 | 93.73% |
| Two or more races | 513 | 4.38% |
| Other race | 152 | 1.3% |
| Black or African American | 49 | 0.42% |
| Asian | 13 | 0.11% |
| Native Hawaiian or Pacific Islander | 6 | 0.05% |
| Native American | 1 | 0.01% |
Married
Widowed
Divorced
Separated
Never Married
Marshall County's average per capita income is $45,852. Household income levels show a median of $69,818. The poverty rate stands at 11.74%.
Name | Median | Mean |
|---|---|---|
| Married Families | $93,492 | - |
| Families | $88,156 | $99,218 |
| Households | $69,818 | $83,438 |
| Non Families | $35,292 | $49,953 |
Average Income
Median Household Income
Poverty Rate
