| City: | Johns Island, South Carolina |
| County: | Charleston County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 8:08:35 PM |
| Population: | No Population Data |
| Area Codes: | 843 / 854 |
| Classification: | PO Box |
| Coordinates: | 32.7924, -80.1083 |
| Quick Link: |
Johns Island is a sea island in Charleston County, South Carolina. ZIP 29457 covers the post office location on Maybank Highway and doesn't have its own geographic territory. The actual island community uses ZIP 29455 for residential addresses, while 29457 provides PO Box services.
The post office maintains 396 PO Boxes and serves 249 businesses. All street-addressed mail on Maybank Highway routes through a single city carrier route, with 78 ZIP+4 records linked to commercial units along the highway. There's no rural delivery from this ZIP. General Delivery is available for those without a permanent address.
Johns Island sits within the Charleston metropolitan area. Nearby neighborhoods include Headquarters Island (1.1 miles), James Island (2 miles), and Winnsboro Lakes (2.1 miles). The island has transformed from agricultural roots into a growing suburban community while retaining its coastal character.
Residents with 29457 PO Boxes pick up mail at the post office on Maybank Highway. Street delivery on the island goes through ZIP 29455. For those who prefer a physical mailing address or need package delivery flexibility, a PO Box at this location provides a convenient option along the island's main commercial corridor.
Maybank Highway is the only street served by this ZIP, functioning as the island's main commercial thoroughfare.
ZIP Code 29457 supports both business and residential activity. According to the Business Census (2024), there are 6 business establishments, employing about 31 people with an annual payroll of $1,392,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 7,376Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 6Source: CBP |
| 1st Quarter Payroll: | $337,000Source: CBP |
| Annual Payroll: | $1,392,000Source: CBP |
| # of Employees: | 31Source: CBP |
ZIP Code 29457 is located in Charleston County, South Carolina, within the Charleston-North Charleston, SC Metropolitan Statistical Area (CBSA 16700) and South Carolina's 1st Congressional District. This Metro area has a population of 664,607 people, about 0.00% of whom live in ZIP Code 29457. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Charleston-North Charleston, SCSource: Census |
| CBSA Number: | 16700Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 664,607Source: Census |
| MSA: | Charleston-North Charleston, SC MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 01Source: USPS |
| Congressional Land Area: | 1547.86 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 29457 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.