| Name | Johnson County |
| State | Missouri |
| FIPS Code | 29101 |
| County Seat | Warrensburg |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 52,964 |
| Population Growth Rate(2000-2022) | 2.7% |
| Majority Ethnicity | White 93.25% |
| Public School Majority Ethnicity | White 81% |
| Partisan Voting Index | Republican:+20 |
| Unemployment Rate (May 2025) | 4.4% |
| Area Code(s) | 660 / 816 / 975 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 93.25% |
| African American | 3.84% |
| Hispanic | 0.25% |
| Asian | 1.93% |
| Native American | 0.36% |
| Hawaiin/Pacific Islander | 0.36% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 81.38% |
| African American | 3.18% |
| Hispanic | 5.93% |
| Asian | 0.94% |
| Native American | 0.48% |
| Hawaiin/Pacific Islander | 1.36% |