Osage County's 2026 population is estimated at 13,476, reflecting a -0.01% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Osage County is the 73rd largest county in Missouri. The 2010 population was 13,907 and has grown -3.1% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.1 years
Female: 41 years
Male: 41.2 years
There are 10,359 adults, (2,449 of whom are seniors) in Osage County.
Female: 6,525 (48.7%)
Male: 6,877 (51.3%)
The racial composition of Osage County includes 97.46% White, and smaller percentages for Two or more races, Black or African American, Native American, Asian, other race and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 13,061 | 97.46% |
| Two or more races | 262 | 1.95% |
| Black or African American | 37 | 0.28% |
| Native American | 24 | 0.18% |
| Asian | 14 | 0.1% |
| Other race | 4 | 0.03% |
Osage County 's average per capita income is $50,064. Household income levels show a median of $76,681. The poverty rate stands at 8.61%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $114,426 | - |
| Families | $102,480 | $133,124 |
| Households | $76,681 | $103,237 |
| Non Families | $30,718 | $40,570 |
Average Income
Median Household Income
Poverty Rate
