- Sep 1 Charles A. Beard, American historian (American Continentalism), dies at 73
- Sep 2 Sylvanus Morley, American archaeologist and spy, dies at 65
- Sep 3 Edvard Beneš, Czech politician and statesman, 2nd & 4th President of Czechoslovakia (1935-38, 45-48), dies at 64
- Sep 5 Richard C. Tolman, American mathematical physicist (b. 1881)
- Sep 6 Gerrit Hendrik Kersten, Dutch vicar and founder (Calvinist Party), dies at 66
- Sep 7 Henricus Andreas Poels, Dutch Roman Catholic theologist and social foreman, dies at 80
- Sep 8 Thomas Mofolo, Lesotho writer (b. 1876)
- Sep 11 Albert Powell, cricketer (one Test South Africa v England 1898-99), dies
Mohammed Ali Jinnah
Sep 11 Muhammad Ali Jinnah [Mahomedali Jinnahbhai], Founder of Pakistan who led the All-India Muslim League (1913-47) until he achieved his dream of Pakistan and became its 1st Governor-General (1947-48), dies of tuberculous at 71
Mohammed Ali Jinnah
- Sep 13 Paul Wegener, German actor and director (The Golem, The Student of Prague), dies at 73
- Sep 16 Ferdinand I MKLM, prince of Saxony-Coburg/tsar of Bulgaria, dies
- Sep 17 Count Folke Bernadotte, UN mediator for Palestine, assassinated
- Sep 17 Lillian Brainthwaite, British actress (Man About the House), dies at 75
- Sep 17 Ruth Benedict, American anthropologist (Patterns of Culture), dies at 61
- Sep 24 Warren William [Krech], American actor (The Wolf Man, Cleopatra), dies of multiple myeloma at 53
- Sep 27 Frank Cellier, British actor (Quiet Wedding, Big Blockade), dies from ill health at 64
- Sep 28 E. J. Ratcliffe, English stage and screen actor, dies at 85
- Sep 28 Gregg Toland, cinematographer, dies at 44
Edith Roosevelt
Sep 30 Edith Roosevelt, First Lady of the United States, dies at 87
Edith Roosevelt