DeKalb County's 2026 population is estimated at 9,854, reflecting a -0.15% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). DeKalb County is the 87th largest county in Missouri. The 2010 population was 12,899 and has grown -23.61% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.2 years
Female: 45 years
Male: 40.4 years
There are 8,724 adults, (2,125 of whom are seniors) in DeKalb County.
Female: 4,682 (43%)
Male: 6,194 (57%)
The racial composition of DeKalb County includes 87.53% White, 6.56% Black or African American, and smaller percentages for other race, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 9,520 | 87.53% |
| Black or African American | 714 | 6.56% |
| Two or more races | 459 | 4.22% |
| Other race | 93 | 0.86% |
| Asian | 62 | 0.57% |
| Native American | 28 | 0.26% |
DeKalb County 's average per capita income is $49,030. Household income levels show a median of $69,826. The poverty rate stands at 8.67%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $95,655 | - |
| Families | $91,938 | $105,913 |
| Households | $69,826 | $84,578 |
| Non Families | $34,194 | $46,240 |
Average Income
Median Household Income
Poverty Rate
