PlainZIP

Johns Island, SC

Single-footprint Census roll-up for Johns Island, SC: 1 USPS ZIP, population 20,478. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet JOHNS-ISLAND-SC · Johns Island, SC 1 ZIPs · 20,478 pop · #2074/25278 · Charleston County

INC-TOP · RANK-TOP · PHOTO-FINISH · BOOK-ONE · OWN-HIGH · POP-TOWN · SPREAD-UNK · HOME-HIGH

  • INC-TOP $121,372
  • RANK-TOP #2074/25278
  • PHOTO-FINISH ≈ Mount Pleasant
  • BOOK-ONE 1 ZIP
  • OWN-HIGH 88% owners
  • POP-TOWN 20,478
  • SPREAD-UNK Single-ZIP book
  • HOME-HIGH $590,800

Nearest income peer: Mount Pleasant, SC (+ $1,260 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Johns Island

Lowest/highest poles plus county-sharing cities nearest Johns Island on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Johns Island, SC sits among US cities with a top-decile household income, on a town-scale population base, across a single-ZIP footprint.

Top 8%
household income vs 25,278 US cities
20,478
city population (Census)
1
USPS ZIP codes covered
$121,372
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

High-income footprint on only 1 ZIP: the city page and the ZIP page nearly coincide. Headline income $121,372 and home value $590,800 should be read as near-neighborhood numbers ; bachelor's attainment averages 59.5%.

Owner-occupancy here runs high (88.2%) - tenure is stable enough that the ZIP detail's owner share is the right next click, not a renter-heavy compare.

Within South Carolina, Fort Mill is the closest lower-income city and Mount Pleasant the closest higher-income city by average ZIP household income. Their 3 and 2 ZIP footprints are the immediate statewide comparison set for Johns Island.

Population concentration

Johns Island's single ZIP 29455 carries the town

Johns Island is published as a single USPS ZIP. Code 29455 is the entire residential footprint (20,478 ACS residents), so the city page and the ZIP page tell the same household story, open that ZIP for income, tenure, and commute detail.

Census ZBP business roll-up

Dense ZBP book packed into Johns Island's one ZIP

Citywide ZBP: 861 establishments, 8,437 employees , annual payroll $402,315k (~42 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 29455 (861 units) ; leading NAICS Construction (171) · also Professional, scientific, and technical services · Retail trade .

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ZIP Codes in Johns Island, SC

These ZIP codes sit in Charleston County, which covers 25 ZIP codes in all; 1 of them fall in Johns Island. See the Charleston County roll-up →

Johns Island sits in the upper half of Charleston County on income: Charleston, North Charleston and Hollywood report less, while Isle Of Palms, Folly Beach and Sullivans Island report more. Sullivans Island marks the far end of that range at $192,813, 59% above Johns Island.

ZIP Code Population Median income Establishments Density
29455 20,478 $121,372 861 74
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Johns Island roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Johns Island, .