Sumner County's estimated 2026 population is 22,222 with a growth rate of -0.26% 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 -7.87% 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 and multiracial populations.
White (89.9%)
Two or more races (5.82%)
Native American (1.53%)
Other race (1.18%)
Black or African American (1.14%)
Asian (0.43%)
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% |
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