Jan Stanisław Jankowski (6 May 1882 – 13 March 1953; noms de guerre "Doktor", "Jan", "Klonowski", "Sobolewski", "Soból") was a Polish politician, an important figure in the Polish civil resistance during World War II and a Government Delegate at Home. Arrested by the NKVD, he was sentenced in the Trial of the Sixteen and murdered in a Soviet prison.