Harper County's 2026 population is estimated at 5,455, reflecting a 0.39% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Harper County is the 63rd largest county in Kansas. The 2010 population was 6,008 and has grown -9.2% since 2010.
Data after 2023 is projected based on recent change
Overall: 40.6 years
Female: 42.2 years
Male: 40.1 years
There are 4,009 adults, (1,171 of whom are seniors) in Harper County.
Female: 2,726 (50.5%)
Male: 2,674 (49.5%)
The racial composition of Harper County includes 89.35% White, 3.19% other race, and smaller percentages for Black or African American, Native American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 4,825 | 89.35% |
| Two or more races | 328 | 6.07% |
| Other race | 172 | 3.19% |
| Black or African American | 45 | 0.83% |
| Native American | 15 | 0.28% |
| Asian | 15 | 0.28% |
Harper County 's average per capita income is $43,138. Household income levels show a median of $53,488. The poverty rate stands at 17.3%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $83,542 | - |
| Families | $75,125 | $90,999 |
| Households | $53,488 | $70,967 |
| Non Families | $34,661 | $42,819 |
Average Income
Median Household Income
Poverty Rate
