Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/SC/BARNWELL

Barnwell ZIP code, South Carolina

The ZIP code for Barnwell, SC is 29812, and its area codes are 839 and 803.

USPS city name
1 ZIP code
Population
4,613
Area codes
839, 803

Barnwell in numbers

About 4,613 people live in Barnwell, in 1,789 households. The median household income is $52,006 a year, 25% below the South Carolina median of $69,324 (US: $80,734). The median owner-occupied home is valued at $145,300 (44% below the South Carolina median), and median gross rent is $678 a month. The median age is 36.4; 18.3% of adults 25 and over hold a bachelor's degree or higher (32.1% across South Carolina); the average commute takes 24 minutes.

Population4,613Barnwell4,613
Households1,789Barnwell1,789
Median age36.4Barnwell36.4South Carolina40.2US 38.9
Median household income$52,006Barnwell$52,006South Carolina$69,324US $80,734
Median home value$145,300Barnwell$145,300South Carolina$259,000US $332,700
Median gross rent$678Barnwell$678South Carolina$1,180US $1,413
Bachelor's degree or higher18.3%Barnwell18.3%South Carolina32.1%US 35.7%
Mean commute24.4 minBarnwell24.4 minSouth Carolina25.6 minUS 26.4 min
Population density588 / sq miBarnwell588 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Barnwell city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Barnwell

ZIP codes with the USPS city name Barnwell
ZIP City Type Population Median income Median home
29812 Barnwell , SC Standard 11,132 $51,870 $112,900

Map of Barnwell ZIP codes

29812

The ZIP codes of Barnwell, SC, 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.

Towns near Barnwell

The nearest larger towns are Aiken (32,521 people, 29 mi), Orangeburg (13,253 people, 34 mi) and Belvedere (5,180 people, 39 mi).

Towns near Barnwell
TownPopulationDistance
Williston 2,870 11.5 mi
Denmark 3,117 14.3 mi
Allendale 2,653 16.5 mi
Bamberg 2,996 19.8 mi
New Ellenton 2,837 22.0 mi
Aiken 32,521 28.8 mi
Hampton 2,636 29.8 mi

More nearby: every ZIP code in Barnwell County · South Carolina ZIP codes

Cite this page

zipcodes.pro. “Barnwell, SC ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/sc/barnwell

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