ZIP Code 29457

29457 is one of South Carolina's ZIP codes, delivering to addresses in Johns Island, Charleston County.

City: Johns Island
County: Charleston County
State: South Carolina
Prefix: 294xx

Where this code sits

29457 is part of the 294xx range, the group of codes handled by one mail processing centre. Johns Island is served by 2 ZIP codes in total.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 29457 delivers to without sharing its boundary.

ZIP codes nearest 29457

The ZIP codes whose reference points sit closest to 29457.
ZIP code	Distance	Delivers to
ZIP code 29455	0.0 mi	Johns Island, SC
ZIP code 29414	3.6 mi	Charleston, SC
ZIP code 29407	5.9 mi	Charleston, SC
ZIP code 29470	6.6 mi	Ravenel, SC
ZIP code 29404	7.7 mi	Charleston Afb, SC
ZIP code 29418	7.8 mi	North Charleston, SC
ZIP code 29405	8.0 mi	North Charleston, SC
ZIP code 29409	8.6 mi	Charleston, SC

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 29457, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 29457. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.