| Name | Harper County |
| State | Oklahoma |
| FIPS Code | 40059 |
| County Seat | Buffalo |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 3,207 |
| Population Growth Rate(2020-2024) | -1.84% |
| Majority Ethnicity | White 76.53% |
| Public School Majority Ethnicity | White 55% |
| Partisan Voting Index | Strongly Republican:+41 |
| Unemployment Rate (May 2026) | 2.8% |
| Sales Tax Rate (2025) | 6.5% |
| Area Code(s) | 580 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 76.53% |
| African American | 0.06% |
| Hispanic | 23.32% |
| Asian | 0.06% |
| Native American | 0.03% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 54.68% |
| African American | 0% |
| Hispanic | 40.45% |
| Asian | 0% |
| Native American | 0.75% |
| Hawaiin/Pacific Islander | 0% |