Alexander Cartellieri (19 June 1867 – 16 January 1955) was a German historian, principally of the High Middle Ages. Between 1904 and 1934 he held a full professorship for Medieval and Modern History at the University of Jena. After his retirement in 1934, he continued to live in Jena through the National Socialist years, the war, Soviet occupation and the early years of German partition.