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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Johns Island, SC

Johns Island, SC Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 29455StandardCharleston20,478843
ZIP Code 29457P.O. BoxCharleston0843

Timezone(s):Eastern (GMT -05:00)
Population:20,478 (More Details)
Male Population:10,147
Female Population:10,331
Median Age:44
ZIP Codes:2
Area Codes:1
Total Area:1,358 square miles (county)
Land Area:916 square miles (county)
Water Area:442 square miles (county)

Johns Island, SC Demographic Information *

There is no Census data for the city of JOHNS ISLAND, SC. We have pulled information for the ZIP Code 29455 instead.
Total population20,478
Male population10,147
Female population10,331
Median age (years)44.2
White Population13,943
Black Population5,025
Indian Population69
Asian Population151
Hawaiian Population11
Hispanic Population1,841
Median age (Male)42
Median age (Female)46
Total households8,394
Family households (families)5,782
Average household size2.42
Average family size2.85
Total housing units13,079
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 5/1/2022],
  2. Internal Data Creation [Last Updated: 5/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],