ZIP codes

ZIP codes in Dorchester County, South Carolina

Dorchester County has 15 ZIP codes. 3 lie entirely inside it and 12 are shared with neighboring counties, so part of their land and their people are elsewhere. About 171,751 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 15; With 1% or more of their land inside
Entirely inside: 3; 99% or more of their land
Shared with other counties: 12; Most with Charleston County (7)
Most populated ZIP: 29483; 59,186 people · Summerville
Least populated ZIP: 29471; 1,135 people · Reevesville
Largest ZIP by land: 29472; 190 sq mi · Ridgeville

Map of the ZIP codes in Dorchester County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Dorchester County

15 ZIP codes in Dorchester County, SC, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
29018	Bowman	3,559	2.5%	≈ 117
29414	Charleston	44,727	18%	≈ 909
29418	North Charleston	26,052	23%	≈ 7,889
29420	North Charleston	23,959	60%	≈ 16,801
29426	Adams Run	1,697	17%	≈ 632
29432	Branchville	2,424	7.0%	≈ 197
29437	—	2,281	100%	2,281
29448	Harleyville	1,997	100%	1,997
29456	North Charleston	41,214	25%	≈ 16,625
29470	Ravenel	5,639	34%	≈ 1,252
29471	Reevesville	1,135	97%	≈ 1,112
29472	Ridgeville	12,722	60%	≈ 9,682
29477	St. George	7,176	99.1%	≈ 7,143
29483	Summerville	59,186	83%	≈ 53,331
29485	North Charleston	58,507	94%	≈ 51,783

ZIP codes shared with other counties

These 12 ZIP codes have part of their land in another county. The first figure is the share of their land in Dorchester County; then, where the rest lies.

29018 (Bowman): 2.5% here; 97% in Orangeburg County.
29414 (Charleston): 18% here; 82% in Charleston County.
29418 (North Charleston): 23% here; 77% in Charleston County.
29420 (North Charleston): 60% here; 40% in Charleston County.
29426 (Adams Run): 17% here; 83% in Charleston County.
29432 (Branchville): 7.0% here; 61% in Orangeburg County and 33% in Bamberg County.
29456 (North Charleston): 25% here; 46% in Charleston County and 29% in Berkeley County.
29470 (Ravenel): 34% here; 66% in Charleston County.
29471 (Reevesville): 97% here; 2.8% in Orangeburg County.
29472 (Ridgeville): 60% here; 32% in Berkeley County and 7.9% in Colleton County.
29483 (Summerville): 83% here; 16% in Berkeley County.
29485 (North Charleston): 94% here; 6.5% in Charleston County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are North Charleston (4), Adams Run (1), Bowman (1), Branchville (1), Charleston (1), and Harleyville (1); 11 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 290 and 294.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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