- Jan 2 Theobald von Bethmann-Hollweg, Chancellor of the German Empire (1909-17), dies at 64
- Jan 7 Benno Erdmann, German philosopher (Logik I), dies at 69
- Jan 18 Adolf von Hildebrand, German sculptor, dies at 73
- Jan 22 Captain George Streeter, American riverboat captain and circus owner (b. 1837)
- Jan 27 Maurice Vincent Buckley, Australian soldier (b. 1891)
- Feb 4 Xavier Mellery, Belgian painter/illustrator, dies at 75
- Feb 7 Peter Kropotkin, Russ Prince/geologist/revolut anarchist, dies at 78
- Feb 8 Pjotr A Kropotkin, Russian ruler/anarchist, dies at 78
- Feb 13 Willem P C Knuttel, Dutch bibliography/librarian, dies at 67
- Feb 22 Salim Al-Mubarak Al-Sabah, Emir of Kuwait (b. 1864)
- Feb 26 Carl Menger, Austrian economist, dies at 81
- Mar 1 Nicholas Petrovic Njegos, King of Montenegro (1910-18), dies at 79
- Mar 2 Champ Clark, American politician (b. 1850)
- Mar 3 P.J.H. [Pierre] Cuypers, Dutch architect (Amsterdam museum), dies at 93
- Mar 11 Sherburne W Burnham, US astronomer (binary stars), dies at 83
- Mar 12 Isabella Caroline Somerset, British philanthropist, temperance leader and campaigner for women's rights, dies at 69
- Mar 12 Giovanni Agnelli, Italian industrialist and CEO (Fiat Automakers), dies at 81
- Mar 21 "Big Jim" Colisimo, US gangster, murdered by Al Capone
- Mar 24 James Cardinal Gibbons, Archbishop of Baltimore, dies at 86
- Mar 29 John Burroughs, American writer and nature enthusiast (Burroughs Medal namesake), dies at 83
- Apr 11 Augusta Victoria, Queen of Prussia/wife of Emperor Wilhelm II, dies
- May 5 Alfred H Fried, Austrian/German pacifist (Nobel 1911), dies
- May 12 Emilia Pardo Bazan, Spanish writer (La sirena negra), dies
- May 13 Jean Aicard, French poet and novelist (b. 1848)
- May 22 Marie E Wilton, writer, dies
- May 28 Geo Mestdagh, Belgian aviation pioneer, dies
- Jun 4 Heinrich E Albers-Schoenberg, German x-ray experimenter, dies at 56
- Jun 5 Georges Feydeau, French playwright (Chat and Poche), dies at 58
- Jun 18 Eduardo Acevedo Díaz, Uruguayan writer (Nativa, Lanza y Sable), dies at 70
- Jun 18 Herman Baccaert, Flemish philological/writer (Kantkennis), dies at 37
- Jun 19 Ramon Lopez Velarde, Mexican poet (La Sangre Devota), dies at 33
- Jun 29 Otto Seeck German classical historian (b. 1850)
- Jul 11 Gabriel Lippmann, French physicist and inventor, dies at 75
- Aug 7 Alexander A Block, Russian poet (Dvenatsat), dies at 40
- Aug 8 Juhani Aho, Finnish journalist and writer (Panu, Tuomio), dies at 59
- Aug 10 John M Martin, last confederate congress member, dies
- Aug 16 Peter I Karadjordjevic, King of Serbia/Yugoslavia (1903-21), dies at 77
- Aug 24 Nikolay Gumilyov, Russian poet (b. 1886)
- Aug 26 Ludwig Thoma, writer, dies
- Aug 26 Matthias Erzberger, German min of Finance, murdered at 45
- Aug 29 Joel Asaph Allen, American zoologist (Allen's rule) and first curator of birds and mammals at the American Museum of Natural History, dies at 83
- Sep 2 Henry Austin Dobson, English poet (b. 1840)
- Sep 2 Anthony Francis Lucas Croatian-born oil pioneer (b. 1855)
- Sep 7 Alfred William Rich, watercolor painter (b. 1856)
- Sep 11 Subramanya Bharathy, Tamil poet (b. 1882)
- Sep 13 Italo Svevo, writer, dies at 59
- Sep 13 Ludwig-Alexander von Battenberg [Mountbatten], admiral (WWI), dies at 67
- Sep 15 Roman von Ungern-Sternberg, Russ baron/general, dies
- Sep 21 José Celso Barbosa, Puerto Rican physician, sociologist and political leader, dies at 64
- Sep 22 Ivan Vazov, Bulgarian poet, novelist and playwright (Under the Yoke), dies at 71
- Sep 30 Oskar Panizza, German writer (Das Liebeskonzil), dies at 77
- Oct 18 King Ludwig III of Bavaria (b. 1845)
- Oct 19 Antonio Granjo, premier (Portugal), murdered
- Oct 23 John B Dunlop, Scottish inventor air tire (Dunlop Rubber), dies at 81
- Oct 25 Bat Masterson, American gunfighter in the Wild West, dies of a heart attack at 67
- Nov 4 Takasji Hara, premier of Japan, murdered
- Nov 8 Pavol Országh Hviezdoslav, Slovak poet (b. 1849)
- Nov 12 Fernand Khnopff, Belgian painter and sculptor, dies at 63
- Nov 17 Pa Chay Vue, Hmong Nationalist
- Nov 27 Douglas Colin Cameron, Canadian politician]] (b. 1854)
- Nov 28 `Abdu'l-Bahá, Persian leader of the Bahá'í Faith (b. 1844)
- Dec 12 Henrietta Swan Leavitt, American astronomer (period-luminosity relation), dies at 53
- Dec 20 Hans Hartwig von Beseler, German Colonel General, dies at 71
- Dec 21 P B S Pinchback, major Reconstruction politician, dies at 84
- Dec 31 Boies Penrose, U.S. Senator from Pennsylvania (b. 1860)