Riley County's 2026 population is estimated at 74,325, reflecting a 1.2% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Riley County is the 7th largest county in Kansas. The 2010 population was 71,557 and has grown 3.87% since 2010.
Data after 2023 is projected based on recent change
Overall: 25.5 years
Female: 26.4 years
Male: 25.1 years
There are 60,357 adults, (7,203 of whom are seniors) in Riley County.
Female: 33,664 (46.8%)
Male: 38,282 (53.2%)
The racial composition of Riley County includes 76.85% White, 6.55% Black or African American, 4.16% Asian, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 55,289 | 76.85% |
| Two or more races | 6,170 | 8.58% |
| Black or African American | 4,714 | 6.55% |
| Asian | 2,995 | 4.16% |
| Other race | 1,927 | 2.68% |
| Native American | 760 | 1.06% |
| Native Hawaiian or Pacific Islander | 91 | 0.13% |
Riley County 's average per capita income is $47,765. Household income levels show a median of $61,098. The poverty rate stands at 19.87%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $102,414 | - |
| Families | $88,845 | $114,331 |
| Households | $61,098 | $85,480 |
| Non Families | $40,060 | $53,000 |
Average Income
Median Household Income
Poverty Rate
