| Name | Johnston County |
| State | North Carolina |
| FIPS Code | 37101 |
| County Seat | Smithfield |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 242,358 |
| Population Growth Rate(2020-2024) | 10.88% |
| Majority Ethnicity | White 65.96% |
| Public School Majority Ethnicity | White 46% |
| Partisan Voting Index | Republican:+12 |
| Unemployment Rate (May 2026) | 3.3% |
| Sales Tax Rate (2025) | 6.75% |
| Area Code(s) | 919 / 984 / 910 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 65.96% |
| African American | 16.43% |
| Hispanic | 16.08% |
| Asian | 0.78% |
| Native American | 0.7% |
| Hawaiin/Pacific Islander | 0.05% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 46.06% |
| African American | 17.89% |
| Hispanic | 29.51% |
| Asian | 0.82% |
| Native American | 0.29% |
| Hawaiin/Pacific Islander | 0.05% |