Sumner County's estimated 2025 population is 22,284 with a growth rate of -0.11% in the past year according to the most recent United States census data. Sumner County is the 25th largest county in Kansas. The 2010 population was 24,119 and has seen a growth of -7.61% since that time.
Data after 2023 is projected based on recent change
The racial composition of Sumner County includes 89.9% White, and smaller percentages for Native American, other race, Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Native American
Other race
Black or African American
Asian
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 20,125 | 89.9% |
| Two or more races | 1,303 | 5.82% |
| Native American | 342 | 1.53% |
| Other race | 265 | 1.18% |
| Black or African American | 255 | 1.14% |
| Asian | 96 | 0.43% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Sumner County's average per capita income is $46,542. Household income levels show a median of $60,348. The poverty rate stands at 10.75%.
Name | Median | Mean |
|---|---|---|
| Married Families | $97,299 | - |
| Families | $82,406 | $97,873 |
| Households | $60,348 | $78,544 |
| Non Families | $38,217 | $42,741 |
Average Income
Median Household Income
Poverty Rate