OKL

OKL may refer to:


 * Oakleigh Park railway station, London, National Rail station code
 * Oberkommando der Luftwaffe, the air force High Command of the Third Reich
 * Olive Kettering Library, the library of Antioch College, Ohio
 * Oberste Kriegsleitung (Supreme War Command), the supreme command of the Central Powers in the latter part of the First World War
 * Old Kentish Sign Language (ISO 639 code )