Allen County's 2026 population is estimated at 12,343, reflecting a -0.33% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Allen County is the 36th largest county in Kansas. The 2010 population was 13,363 and has grown -7.63% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.2 years
Female: 43.2 years
Male: 38.5 years
There are 9,669 adults, (2,619 of whom are seniors) in Allen County.
Female: 6,360 (50.9%)
Male: 6,123 (49.1%)
The racial composition of Allen County includes 90.31% White, and smaller percentages for Black or African American, other race, Native American, Native Hawaiian or Pacific Islander, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 11,273 | 90.31% |
| Two or more races | 591 | 4.73% |
| Black or African American | 352 | 2.82% |
| Other race | 90 | 0.72% |
| Native American | 76 | 0.61% |
| Native Hawaiian or Pacific Islander | 55 | 0.44% |
| Asian | 46 | 0.37% |
Allen County 's average per capita income is $40,716. Household income levels show a median of $60,689. The poverty rate stands at 9.92%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $97,115 | - |
| Families | $84,439 | $91,159 |
| Households | $60,689 | $76,243 |
| Non Families | $32,182 | $42,758 |
Average Income
Median Household Income
Poverty Rate
