Data Last Updated: July 1, 2025

Dorchester County, SC ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Dorchester, SC.	18 ZIP Codes (8 General, 2 PO Box, 0 Unique, & 8 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with Dorchester, SC. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	843, 854
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Eastern
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Dorchester, SC from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	161,540 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	45035
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	Charleston-North Charleston, SC
Land Area: The approximate amount of land area covered by Dorchester, SC in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	568 square miles
Water Area: The approximate amount of water area covered by Dorchester, SC in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	3 square miles
Coordinates: The latitude/longitude centroid coordinates for Dorchester County, SC.	-80.406718, 33.079335
Quick Link: Copy the direct link to the Dorchester, SCCounty page and use anywhere you like!	https://www.zip-codes.com/county/sc-dorchester.asp

Dorchester, SC ZIP Code Boundaries

Download ZIP Code Database

Load Dorchester County, SC Map

Dorchester County, SC Covers 18 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 29018 *	General	Bowman	3,256	--
ZIP Code 29414 *	General	Charleston	45,150	--
ZIP Code 29418 *	General	North Charleston	24,154	--
ZIP Code 29420	General	North Charleston	23,619	14.62%
ZIP Code 29426 *	General	Adams Run	1,654	--
ZIP Code 29432 *	General	Branchville	2,685	--
ZIP Code 29437	General	Dorchester	2,389	1.48%
ZIP Code 29447	P.O. Box	Grover	0	0.00%
ZIP Code 29448	General	Harleyville	2,337	1.45%
ZIP Code 29456 *	General	Ladson	37,577	--
ZIP Code 29470 *	General	Ravenel	4,598	--
ZIP Code 29471	General	Reevesville	1,510	0.93%
ZIP Code 29472	General	Ridgeville	10,279	6.36%
ZIP Code 29477	General	Saint George	6,344	3.93%
ZIP Code 29483	General	Summerville	56,778	35.15%
ZIP Code 29484	P.O. Box	Summerville	0	0.00%
ZIP Code 29485	General	Summerville	57,181	35.40%
ZIP Code 29486 *	General	Summerville	41,148	--

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Dorchester, SC, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Dorchester, SC Information

Dorchester County, SC Covers 18 ZIP Codes. This includes 8 General ZIP Codes, 2 PO Box ZIP Codes, and 0 Unique (reserved for Business and Volume Mail Receivers). There are also 8 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Dorchester County.

The population for Dorchester County is 161,540, according to the U.S. Census. Population Density is 284.40 persons per square mile. With 64,608 Housing Units, the Average Household Size is 2.65 persons. There are 60,242 Family Households with an Average Family Size of 2.90 persons. 9.95% of the population is without Health Insurance. The 61.19% Employment Rate is 1.39% above the national average of 59.8%.111,681 people aged 25+ have some educational achievement, with 29.97% (or 33,468 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 2 area codes serving this area including843 and 854. Dorchester is also located in the Eastern timezone and the current local time is shown above.

Dorchester is part of the Charleston-North Charleston, SC Core Based Statistical Area (CBSA). Its CBSA Code is 16700.It is classified as a metro area, which means the combined population is 50,000 or more (at its core).

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more (for a micro area) and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Dorchester, SC have 71,745 Residential mailboxes and 3,183 Business mailboxes.There are 3,053 businesses with a total of 37,867 employees. That is an average of 12.4 employees per business. Annual payroll for these businesses is $1,648,416,000. Other Demographics

Dorchester County Demographic Profile

Population & People

Total Population

161,540

Income

Median Household Income

$76,896

Housing

Total Housing Units

64,608

Health

Without Healthcare Coverage

9.95%

Business & Economy

Total Businesses

3,053

Families

Total Households

60,242

Employment

Employment Rate

61.19%

Education

Bachelor's Degree or Higher

29.97%

Total Population: Total number of people from the 2020 U.S. Census for Dorchester, SC. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	161,540
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Dorchester, SC. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	189,584
Total Households: Total number of Households from the 2020 U.S. Census for Dorchester, SC. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	60,242
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	64,608
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.65
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.90

Other Dorchester Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	71,745
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	3,183
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	84,123
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	49,048
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	7,497

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	3,053
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$378,284,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$1,648,416,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	37,867

Sum of all ZIP Codes assigned Dorchester, SC as their primary County.

References

U.S. Postal Service [Last Updated: 7/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 7/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov