Leavenworth County's 2026 population is estimated at 86,540, reflecting a 1.09% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Leavenworth County is the 6th largest county in Kansas. The 2010 population was 76,536 and has grown 13.07% since 2010.
Data after 2023 is projected based on recent change
Overall: 38 years
Female: 39.4 years
Male: 37.2 years
There are 63,472 adults, (13,367 of whom are seniors) in Leavenworth County.
Female: 38,593 (46.4%)
Male: 44,530 (53.6%)
The racial composition of Leavenworth County includes 79.58% White, 7.03% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 66,146 | 79.58% |
| Two or more races | 7,763 | 9.34% |
| Black or African American | 5,844 | 7.03% |
| Other race | 1,656 | 1.99% |
| Asian | 1,177 | 1.42% |
| Native American | 304 | 0.37% |
| Native Hawaiian or Pacific Islander | 233 | 0.28% |
Leavenworth County 's average per capita income is $52,832. Household income levels show a median of $89,218. The poverty rate stands at 8.77%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $121,711 | - |
| Families | $110,482 | $128,932 |
| Households | $89,218 | $108,915 |
| Non Families | $49,712 | $63,517 |
Average Income
Median Household Income
Poverty Rate