| Place Name | Johnston |
| Place Type | Town |
| ZIP Code(s) | 29832 |
| County | Edgefield County |
| Area Code(s) | 803 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 2,426 |
| Population Growth Rate (2010-19) | -15.45% |
| Majority Ethnicity | African American 66.77% |
| Metro/Micro Stats Area | Augusta-Richmond County, GA-SC |
| US Congressional District(s) | South Carolina 3rd |
| State House Districts | 82 |
| State Senate Districts | 25 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 30.26% |
| African American | 66.77% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.97% |