| Name | Johnson County |
| State | Indiana |
| FIPS Code | 18081 |
| County Seat | Franklin |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 168,305 |
| Population Growth Rate(2020-2024) | 3.88% |
| Majority Ethnicity | White 87.76% |
| Public School Majority Ethnicity | White 77% |
| Partisan Voting Index | Republican:+18 |
| Unemployment Rate (May 2026) | 3.2% |
| Sales Tax Rate (2025) | 7% |
| Area Code(s) | 317 / 463 / 812 / 930 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 87.76% |
| African American | 3.11% |
| Hispanic | 4.19% |
| Asian | 4.8% |
| Native American | 0.11% |
| Hawaiin/Pacific Islander | 0.03% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 76.91% |
| African American | 4.09% |
| Hispanic | 6.16% |
| Asian | 7.79% |
| Native American | 0.12% |
| Hawaiin/Pacific Islander | 0.09% |