- Jan 2 Sam Carter, African American resident of Rosewood Florida, lynched in the Rosewood Massacre
- Jan 3 Jaroslav Hašek, Czech writer (The Good Soldier Švejk), dies of heart failure at 39
Katherine Mansfield
Jan 9 Katherine Mansfield, New Zealand short story writer (The Garden Party), dies of tuberculosis at 34
Constantine I
Jan 11 Constantine I, King of Greece (1913-17, 20-22), dies at 54
Wilhelm Röntgen
Feb 10 Wilhelm Röntgen, German physicist who discovered X-rays (Nobel 1901), dies of cancer at 77
Johannes van der Waals
Mar 8 Johannes van der Waals, Dutch physicist (Nobel 1910), dies at 85
- Mar 8 Krišjānis Barons, Latvian writer who published Latvian folk songs, dies at 87
- Mar 22 Theophile Delcasse, French statesman, dies at 71
- Mar 27 James Dewar, Scottish chemist and physicist (Dewarfles/cordiet), dies at 80
- Apr 4 L Martov [Joulij O Tsederbaum], Russ revolutionary, dies at 49
- Apr 4 John Venn, English mathematician (Venn Diagram), dies at 88
- Apr 5 George Herbert, 5th Earl of Carnarvon, English financier and Egyptologist who funded the search for and excavation of Tutankhamun's tomb in the Valley of the Kings, dies at 56 after a severe mosquito bite became infected by a razor cut
- Apr 25 Louis-Olivier Taillon, French Canadian politician, dies at 82
- May 10 Vaslav Vorovsky, Russian delegate, assassinated
- May 11 Henry Martyn Robert, American soldier & parliamentarian (Robert's Rules of Order), dies at 86
- May 14 Charles de Freycinet, French prime minister (b. 1828)
- May 20 Hans Goldschmidt, German chemist, dies
- Jun 5 George H. Breitner, Dutch impressionist painter, dies at 65
- Jun 9 Princess Helena of the United Kingdom, daughter of Queen Victoria, dies at 77
- Jun 10 Pierre Loti [Julien Viaud], French sea officer/writer, dies
- Jun 15 Alexander Stamboeliski, premier Bulgaria (1919-23), dies
- Jun 29 Fritz Mauthner, German author/philosopher (skepticism), dies at 73
- Jun 29 J C Gomez, General/Venezuela's 1st VP, assassinated
- Jul 4 Florimond Fonteyne, Flemish priest/politician (Volkseeuw), dies at 67
- Jul 9 William R. Day, American diplomat and Justice of the U.S. Supreme Court, dies at 74
- Jul 16 Louis Couperus, Dutch poet and writer (Books of Small Soles), dies at 60
- Jul 20 Pancho Villa [José Doroteo Arango Arámbula], Mexican revolutionary general and guerrilla leader,, murdered at 55
- Jul 23 Charles Dupuy, French statesman, 3 times Prime Minister of France (1893, 1894-95, 1898-99), dies at 71
Warren G. Harding
Aug 2 Warren G. Harding, 29th President of the United States (1921-23), dies of a heart attack at the Palace Hotel in San Francisco at 57
- Aug 5 Vatroslav Jagić, Croatian scholar of Slavic studies, dies at 85
- Aug 7 Hendrik Pierson, Dutch theologist (H Pierson Foundation), dies at 89
- Aug 14 Jacob Theodoor Cremer, Dutch tobacco magnate and administrator for the Deli Company in Sumatra, dies at 76
- Aug 19 Vilfredo Pareto, Italian sociologist and economist (b. 1845)
- Aug 24 Kate Douglas Wiggin, American author (Rebecca of Sunnybrook Farm), dies at 66
- Aug 31 Gerrit Kalff, Dutch professor (history of Dutch writers), dies at 67
- Sep 12 Jules Violle, French physicist and inventor, dies at 81
- Sep 22 Marquess of Ripon, English aristocrat and game hunter, dies, after shooting 52nd grouse in one morning at 71
- Oct 14 Marcellus Emants, writer/poet (Refrained from Confession), dies
- Oct 26 Charles Proteus Steinmetz, German-American electrical engineer (development of alternating current), dies at 58
Bonar Law
Oct 30 Andrew Bonar Law, British Prime Minister (Conservative: 1922-23), dies of throat cancer at 64
- Nov 5 Jacques d'Adelswärd-Fersen, French novelist (b. 1880)
- Nov 19 Frans Netscher, Dutch author and journalist (In 3rd Chamber), dies at 59
- Nov 23 Urmuz [Demetru Dem. Demetrescu-Buzău], Romanian writer (Bizarre Pages), commits suicide at 40
- Nov 24 Michel de Klerk, architect (Amsterdam School), dies at 39
- Nov 25 Ernst Debes, German cartographer (Moon Atlas), dies at 83
- Nov 26 Alexander Amfiteatrov, Russian-Italian journalist, newspaper editor, novelist, and historian, dies at 60
- Dec 1 Virginie Loveling, Flemish writer (Sophie) and poet, dies at 87
- Dec 12 Raymond Radiguet, French journalist/writer (Ball du Comte), dies at 20
- Dec 26 Dietrich Eckart, German Nazi politician (b. 1868)
Gustave Eiffel
Dec 27 Gustave Eiffel, French engineer (Eiffel Tower), dies at 91
