| Place Name | Johns Island |
| Place Type | Unincorporated |
| ZIP Code(s) | 29455 |
| County | Charleston County |
| Area Code(s) | 843,854 |
| Timezone | Eastern Standard Time (EST) |
| Population () | |
| Metro/Micro Stats Area | Charleston-North Charleston, SC |
| US Congressional District(s) | South Carolina 6th |
| State House Districts | 116 |
| State Senate Districts | 41 |