ZIP Code 29457 is located in Johns Island South Carolina. 29457 is entirely within Charleston County. Regionally, it is located in the Charleston Area.
| ZIP Code Name | Johns Island |
| Primary County | Charleston County |
| ZIP Code Type | PO Box |
| Current Time | EDT |
| Coordinates | 32.74174118,-80.04180145 |
| Adjacent ZIP Codes | |
| Region | Charleston Area |
| Metropolitan/Micropolitan Stat Area | Charleston-North Charleston, SC |
| Time Zone | Eastern Daylight Time |
| IANA Timezone | America/New_York |