Below is a list of Barnwell County SC zip codes. For your research we have also included Barnwell County Area Code, Time Zone, UTC and the local County FIPS Code. Each Barnwell County South Carolina zip code has a center Longitude / Latitude point (the Barnwell County center is -81.36060333252 / 33.324901580811). For your convenience we have also indicated if that zip code in Barnwell County observes Daylight Savings time.