Barnwell Regional Airport (IATA: BNL, ICAO: KBNL, FAA LID: BNL) is a county owned, public use airport located one nautical mile (2 km) northwest of the central business district of Barnwell, a city in Barnwell County, South Carolina, United States. It is owned by Barnwell County. It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a general aviation facility.