Knox County's 2026 population is estimated at 3,748, reflecting a 0.11% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Knox County is the 113th largest county in Missouri. The 2010 population was 4,125 and has grown -9.14% since 2010.
Data after 2023 is projected based on recent change
Overall: 40.1 years
Female: 40.9 years
Male: 39.3 years
There are 2,824 adults, (808 of whom are seniors) in Knox County.
Female: 1,867 (49.7%)
Male: 1,889 (50.3%)
The racial composition of Knox County includes 94.81% White, and smaller percentages for Native Hawaiian or Pacific Islander, Two or more races, Black or African American, other race, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 3,561 | 94.81% |
| Native Hawaiian or Pacific Islander | 76 | 2.02% |
| Two or more races | 76 | 2.02% |
| Black or African American | 24 | 0.64% |
| Other race | 9 | 0.24% |
| Asian | 7 | 0.19% |
| Native American | 3 | 0.08% |
Knox County 's average per capita income is $38,710. Household income levels show a median of $57,788. The poverty rate stands at 11.9%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $90,139 | - |
| Families | $76,711 | $101,171 |
| Households | $57,788 | $76,853 |
| Non Families | $30,286 | $36,237 |
Average Income
Median Household Income
Poverty Rate
