Barnwell Regional Airport (IATA: BNL, ICAO: KBNL, FAA LID: BNL) is a county-owned, public-use airport located 1 nautical mile (1.9 kilometres) northwest of the central business district of Barnwell, a city in Barnwell County, South Carolina, United States. It is owned by Barnwell County. The airport serves the general aviation community, with no scheduled commercial airline service.