Dorchester County, SC ZIP codes
There are 10 ZIP codes in Dorchester County, SC, in 8 towns, from 29420 to 29485. The largest are 29485 (Summerville), 29483 (Summerville) and 29420 (North Charleston).
The county seat is St. George.
- ZIP codes
- 10
- Towns
- 8
- County seat
- St. George
- County FIPS
45035- State
- South Carolina
- Population
- 167,201
- Median household income
- $78,198
- Land area
- 568 sq mi
- Metro area
- Charleston-North Charleston
Dorchester County ZIP codes by town
- St. George (county seat)
- 29477
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Dorchester County ZIP codes
The ZIP codes of Dorchester County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Dorchester County in numbers
About 167,201 people live in Dorchester County, in 63,179 households, the 12th most populous of South Carolina's 46 counties. The median household income is $78,198 a year, 13% above the South Carolina median of $69,324 (US: $80,734). The median owner-occupied home is valued at $329,300 (27% above the South Carolina median), and median gross rent is $1,463 a month. The median age is 38.0; 29.8% of adults 25 and over hold a bachelor's degree or higher (32.1% across South Carolina); the average commute takes 31 minutes.
| Population | 167,201 |
|---|---|
| Households | 63,179 |
| Median age | 38.0 |
| Median household income | $78,198 |
| Median home value | $329,300 |
| Median gross rent | $1,463 |
| Bachelor's degree or higher | 29.8% |
| Mean commute | 31.3 min |
| Population density | 294 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Dorchester County
| Town | ZIP codes | Population |
|---|---|---|
| North Charleston | 1 | 119,913 |
| Summerville | 3 | 51,654 |
| Dorchester | 1 | 2,281 |
| St. George | 1 | 2,154 |
| Ridgeville | 1 | 1,740 |
| Harleyville | 1 | 592 |
| Grover | 1 | 345 |
| Reevesville | 1 | 271 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Dorchester County.
- Charleston County (36)
- Berkeley County (14)
- Orangeburg County (18)
- Colleton County (12)
- Bamberg County (4)
Not sure you are in Dorchester County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Dorchester County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
29420 | North Charleston , SC | Standard | 23,959 | $72,661 | $331,700 |
29437 | Dorchester , SC | Standard | 2,281 | $61,821 | $172,900 |
29447 | Grover , SC | No street area | — | — | — |
29448 | Harleyville , SC | Standard | 1,997 | $71,967 | $194,900 |
29471 | Reevesville , SC | Standard | 1,135 | $38,500 | $109,700 |
29472 | Ridgeville , SC | Standard | 12,722 | $75,325 | $263,100 |
29477 | Saint George , SC | Standard | 7,176 | $53,894 | $90,300 |
29483 | Summerville , SC | Standard | 59,186 | $85,750 | $333,300 |
29484 | Summerville , SC | No street area | — | — | — |
29485 | Summerville , SC | Standard | 58,507 | $82,987 | $341,600 |
Cite this page
zipcodes.pro. “Dorchester County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/sc/county/dorchester
Underlying data is public domain or openly licensed — sources, vintages and licences.