| Name | Decatur County |
| State | Kansas |
| FIPS Code | 20039 |
| County Seat | Oberlin |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 2,939 |
| Population Growth Rate(2000-2022) | -6.65% |
| Majority Ethnicity | White 97.81% |
| Public School Majority Ethnicity | White 85% |
| Partisan Voting Index | Strongly Republican:+36 |
| Unemployment Rate (February 2025) | 3.2% |
| Area Code(s) | 785 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 97.81% |
| African American | 1.08% |
| Hispanic | 0.97% |
| Asian | 0.15% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 85.47% |
| African American | 0.48% |
| Hispanic | 8.96% |
| Asian | 0% |
| Native American | 0.97% |
| Hawaiin/Pacific Islander | 0% |