Cumberland County's 2026 population is estimated at 10,371, reflecting a 0.32% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Cumberland County is the 87th largest county in Illinois. The 2010 population was 11,053 and has grown -6.17% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.1 years
Female: 43 years
Male: 43.2 years
There are 8,017 adults, (2,173 of whom are seniors) in Cumberland County.
Female: 5,180 (50.1%)
Male: 5,154 (49.9%)
The racial composition of Cumberland County includes 95% White, and smaller percentages for Black or African American, other race, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 9,817 | 95% |
| Two or more races | 488 | 4.72% |
| Black or African American | 18 | 0.17% |
| Other race | 7 | 0.07% |
| Asian | 4 | 0.04% |
Cumberland County 's average per capita income is $45,559. Household income levels show a median of $73,327. The poverty rate stands at 9.09%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $103,995 | - |
| Families | $95,833 | $106,841 |
| Households | $73,327 | $87,318 |
| Non Families | $36,294 | $45,519 |
Average Income
Median Household Income
Poverty Rate
