| Name | Riley County |
| State | Kansas |
| FIPS Code | 20161 |
| County Seat | Manhattan |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 71,673 |
| Population Growth Rate(2020-2024) | -0.4% |
| Majority Ethnicity | White 78.19% |
| Public School Majority Ethnicity | White 64% |
| Partisan Voting Index | Democratic:+0 |
| Unemployment Rate (May 2026) | 3.8% |
| Sales Tax Rate (2025) | 7.2% |
| Area Code(s) | 785 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 78.19% |
| African American | 6.37% |
| Hispanic | 9.97% |
| Asian | 4.08% |
| Native American | 1.11% |
| Hawaiin/Pacific Islander | 0.28% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 64.23% |
| African American | 7.8% |
| Hispanic | 14.34% |
| Asian | 3.61% |
| Native American | 0.39% |
| Hawaiin/Pacific Islander | 0.5% |