🇺🇸 United States ZIP Code

STANDARD

29455

Johns Island

ZIP Code 29455 is a standard zip code serving Johns Island, Johns Island, South Carolina (SC), in Charleston County, United States. It has an estimated population of 20,478 with a median household income of $60,954. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: South Carolina (SC)
County: Charleston
City: Johns Island
Timezone: America/New_York

Coordinates

Latitude: 32.792400
Longitude: -80.108100

Geographic Details

Land Area: 107.09 mi²
Water Area: 11.02 mi²
Population Density: 191.0 people per mi² (60th percentile)
Bounding Box: 32.864236°N, 32.544690°S, -79.986997°E, -80.209161°W

With 20,478 residents spread across 107.09 square miles, this area has a population density of 191.0 people per square mile.

Demographics

20,478

Population

80th percentile

$60,954

Median Income

75th percentile

$261,500

Median Home Value

80th percentile

107.09 mi²

Land Area

The median household income in 29455 is $60,954, and the median home value is $261,500. This places the area in the top 25% nationally for household income.

Housing

13,079

Total Units

8,394

Occupied Units

64.2%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Johns Island, SC.

29457

Johns Island

Similar ZIP Codes in South Carolina

ZIP codes with similar median household income in South Carolina.

29376

Roebuck

$58,185

29073

Lexington

$52,158

29420

North Charleston

$56,864

29229

Columbia

$63,753

29585

Pawleys Island

$55,471

29302

Spartanburg

$53,345

29412

Charleston

$59,216

29697

Williamston

$51,947

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.