Miami County's 2026 population is estimated at 36,545, reflecting a 1.12% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Miami County is the 13th largest county in Kansas. The 2010 population was 32,882 and has grown 11.14% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.7 years
Female: 41.7 years
Male: 41.8 years
There are 26,710 adults, (6,323 of whom are seniors) in Miami County.
Female: 17,456 (50%)
Male: 17,482 (50%)
The racial composition of Miami County includes 90.29% White, and smaller percentages for other race, Black or African American, Native American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 31,547 | 90.29% |
| Two or more races | 2,023 | 5.79% |
| Other race | 657 | 1.88% |
| Black or African American | 442 | 1.27% |
| Native American | 218 | 0.62% |
| Asian | 51 | 0.15% |
Miami County 's average per capita income is $57,852. Household income levels show a median of $89,000. The poverty rate stands at 7.9%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $120,957 | - |
| Families | $109,579 | $125,242 |
| Households | $89,000 | $106,192 |
| Non Families | $41,422 | $55,688 |
Average Income
Median Household Income
Poverty Rate
