St. Clair County Airport (IATA: PLR, ICAO: KPLR, FAA LID: PLR) is a public use airport located three nautical miles (6 km) southeast of the central business district of Pell City, in St. Clair County, Alabama, United States. It is owned by the St. Clair County Airport Authority. According to the FAA's National Plan of Integrated Airport Systems for 2009–2013, it is categorized as a reliever airport.