Atchison County's 2026 population is estimated at 16,463, reflecting a 0.65% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Atchison County is the 31st largest county in Kansas. The 2010 population was 16,855 and has grown -2.33% since 2010.
Data after 2023 is projected based on recent change
Overall: 36.1 years
Female: 38.2 years
Male: 34.4 years
There are 12,671 adults, (2,931 of whom are seniors) in Atchison County.
Female: 8,209 (50.6%)
Male: 7,999 (49.4%)
The racial composition of Atchison County includes 87.65% White, 3.63% Black or African American, and smaller percentages for Asian, other race, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 14,207 | 87.65% |
| Two or more races | 1,261 | 7.78% |
| Black or African American | 588 | 3.63% |
| Asian | 55 | 0.34% |
| Other race | 55 | 0.34% |
| Native American | 42 | 0.26% |
Atchison County 's average per capita income is $44,740. Household income levels show a median of $61,112. The poverty rate stands at 12.98%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $101,333 | - |
| Families | $83,071 | $95,537 |
| Households | $61,112 | $78,946 |
| Non Families | $29,064 | $44,426 |
Average Income
Median Household Income
Poverty Rate
