Ignaz Jastrow (September 13, 1856 - May 2, 1937 in Berlin) was a German economist and historian, born in Nakel and educated at the universities of Breslau, Berlin, and Göttingen. He became a university docent at Berlin in 1885 and was Leopold von Ranke's assistant in historical work. He edited the Jahresberichte der Geschichtswissenschaft (1881-94); Sociale Praxis (1895-97); Das Gewerbegericht (1896 et seq.); Der Arbeitsmarkt (1897 et seq.); and wrote many works, amongst them are:
In 1904 he pursued industrial investigations in the United States, and in 1905 became professor of Administrative Science at Berlin.