- Jan 4 Albert Löfgren, Swedish clarinetist and composer (Slåttergille Rhapsody), dies at 57
- Jan 9 Edward W Buck, Dutch/US editor (Ladies Home Journal), dies at 66
- Jan 13 Auguste Rateau, French mining engineer and inventor (Rateau steam turbine), dies at 66
- Jan 13 Sebastian Ziani de Ferranti, English electrical engineer and inventor, dies at 65
- Jan 22 Stephen Mather, American industrialist and conservationist (organized US National Park Service), dies at 62
- Jan 24 Rebecca Latimer Felton, American writer and politician (first woman to serve as U.S. Senator (Georgia)), dies at 94 [1]
- Jan 27 Jean Hure, French composer and organist, dies at 52
- Feb 2 Sara Louisa Oberholtz, American economist and social reformer (children's school saving banks), dies at 88
- Feb 6 Eva Strittmatter, German writer (Tinko), dies at 17
- Feb 22 Godfried Coenraad van Daalen, Dutch general (controversial Governor of Aceh accused of brutality), dies at 66
- Feb 23 Horst Wessel, German nazi lyricist (Fahne Hoch), dies at 22
- Feb 23 Mabel Normand [Muriel Fortescue], American silent-film actress, director and comedienne (Mickey), dies of tuberculosis at 35
- Feb 24 Jacobus of Looy, Dutch writer and painter (Death of My Cat), dies at 74
- Feb 26 Rafael Merry del Val, British-born Spanish Roman Catholic cardinal, dies at 64
- Feb 28 C. K. Scott-Moncrieff, Scottish writer and translator, dies at 40
D. H. Lawrence (1885-1930)
Mar 2 English poet and writer (Lady Chatterley's Lover), dies of tuberculosis at 44
- Mar 6 Alfred von Tirpitz, German architect of the Imperial Navy (Tirpitz Plan, Unrestricted U-boat Warfare) and World War I Grand Admiral, dies at 80
- Mar 6 William Milton, British cricket all-rounder (3 Tests South Africa, 2 wickets) and rugby union centre (2 Tests England), dies at 75
- Mar 8 Edward Terry Sanford, Associate Justice of the United States Supreme Court (b. 1865)
William Howard Taft (1857-1930)
Mar 8 27th US President (Republican: 1909-13) and Chief Justice, dies at 72
- Mar 12 Alois Jirásek, Czech writer (b. 1851)
William George Barker (1894-1930)
Mar 12 Canadian fighter ace (Victoria Cross recipient), dies in a training accident at 35
Arthur Balfour (1848-1930)
Mar 19 British Prime Minister (Conservative: 1902-05) and Foreign Secretary (Balfour Declaration), dies of unremitting circulatory trouble at 81
- Mar 28 Uchimura Kanzō, Japanese religious writer and pacifist (How I Became a Christian), dies at 69
- Mar 29 Anton Bettelheim, Austrian writer, dies at 78
- Apr 1 Cosima Liszt, Austrian wife of composer Richard Wagner (founded Bayreuth Festival together), daughter of Franz Liszt and Marie d'Agoult, dies at 92
- Apr 1 Zawditu, 1st reigning female monarch of Ethiopia, dies
- Apr 2 Zewditu, Empress of Ethiopia (1916-30), dies at 53
- Apr 3 Emma Albani, Canadian operatic soprano, dies at 82
- Apr 4 Vladimir Majakovski, Russian poet, dies
Vladimir Mayakovsky (1893-1930)
Apr 14 Russian poet and playwright (Ode to Revolution, The Bathhouse), commits suicide by shooting himself through the heart at 36
- Apr 16 José Carlos Mariátegui, Peruvian journalist, political philosopher and activist (b. 1894)
- Apr 17 Alexander Golovin, Russian painter (b. 1863)
- Apr 19 Charles Scribner II, American magazine and book publisher, dies at 75
- Apr 19 Georges-Casimir Dessaulles, Canadian senator (b. 1827)
- Apr 21 Alex Smith, Scottish-American golfer (US Open 1906, 10), dies at 56
- Apr 21 Robert Bridges, English poet (Testament of beauty) and British Poet Laureate (1913-30), dies at 85
- Apr 22 Jeppe Aakjær, Danish poet & novelist (Bondens Søn), dies at 63
- Apr 24 Henry Ernest Dudeney, English mathematician and puzzle maker, dies at 73
- May 8 (Ivar) Henning Mankell, Swedish pianist and composer, dies at 61
- May 10 Edward Stratemeyer, American author (The Rover Boys), dies at 67
- May 12 Pieter Jelles Troelstra, Dutch politician (SDAP), dies at 70
Fridtjof Nansen (1861-1930)
May 13 Norwegian Arctic explorer and advocate for refugees (Nobel Peace Prize 1922), dies of a heart attack at 68
- May 13 Helene Lange, German feminist (honoured with the Grand Prussian State Medal), dies at 82
- May 14 Władysław Orkan [Franciszek Ksawery Smaciarz], Polish author (Nowele Zebrane), dies at 54
- May 17 Herbert David Croly, US founder (New Republic), dies at 61
- May 18 João Marcelino Arroio, Portuguese composer (Amor de Perdiçâo), dies at 68
- May 23 R. D. Banerji, Indian archaeologist and historian (discovered ancient Indus city of Mohenjo-daro), dies at 45 [1]
- May 25 Randall Thomas Davidson, Archbishop of Canterbury (b. 1848)
- Jun 5 Jules Pascin [Julius Pincas], Bulgarian-American painter and cartoonist, commits suicide at 45
- Jun 10 Adolf Harnack, German theologian (b. 1851)
- Jun 11 George Alexander, British cricketer (two early Tests for Australia), dies at 79
- Jun 11 Henry Clay Folger, American CEO of Standard Oil and founder of the Folger Shakespeare Library, dies at 72
- Jun 12 Dyce Willcocks, cricketer ("Grand Old Man" of Canadian cricket), dies
- Jun 13 Henry Segrave, British racing driver who held land speed records and the water speed record (b. 1896)
- Jun 16 Elmer Ambrose Sperry, American entrepreneur and inventor (gyrocompass), dies at 69
- Jun 16 Ezra Fitch, American businessman (Abercrombie & Fitch founder), dies at 64
- Jun 22 Karl von Amira, German historian, dies at 82
- Jun 30 Harvey W. Wiley, American chemist known for leadership in the passage of the landmark Pure Food and Drug Act of 1906, dies at 85
- Jul 2 Andres Randolf, Danish-American actor (Love of Sunya, Dangerous Curves, The Kiss), dies at 59
Arthur Conan Doyle (1859-1930)
Jul 7 British author who brought Sherlock Holmes to life twice, dies at 71
- Jul 8 Joseph Ward, 17th Prime Minister of New Zealand (1906-12), dies at 74
- Jul 14 William Hare Ashley, South African cricketer (Test South Africa, 7 wkts), dies at 68
- Jul 15 Leopold von Auer, Hungarian-American violinist, dies at 85
- Jul 19 Robert Stout, Prime Minister of New Zealand (1884-87), dies at 85
- Jul 23 Glenn Curtiss, American aviation pioneer and airplane builder, dies at 52
- Jul 28 Allvar Gullstrand, Swedish physician (Nobel Prize 1911), dies at 68
- Jul 29 Alexander von Fielitz, German composer and conductor (Chicago Symphony Orchestra), dies at 69
- Jul 30 Joan Gamper, Swiss-Catalan businessman and founder of FC Barcelona, dies at 52
- Aug 4 Siegfried Wagner, German opera composer and conductor, dies at 61
- Aug 20 Charles Bannerman, Australian cricket batsman (3 Tests; first centurion in Test history 165* 1877), dies at 79
- Aug 26 Leonidas "Lon" Chaney, American actor nicknamed "the man of a 1000 faces" (The Hunchback Of Notre Dame, The Phantom of the Opera), dies after long illness at 47
- Aug 27 Didericus van Epen, Dutch genealogist (Dutch Patriarch, dies at 62
- Aug 28 Alvar Gullstrand, Swedish optician (Nobel 1911), dies
- Aug 29 William Archibald Spooner, English writer (b. 1844)
- Sep 5 Carl Panzram, American serial killer and rapist, dies at 38
- Sep 5 Robert Means Thompson, American naval officer (b. 1849)
- Sep 10 Aubrey Faulkner, South African cricket all-rounder (25 Tests, 4 x 100s, TS 204; Transvaal), dies from self inflicted gas poisoning at 48
- Sep 15 Milton Sills, American actor (The Sea Hawk), dies from a heart attack at 48
- Sep 19 Hendrik Zwaardemaker, Dutch physiologist (invented the olfactometer), dies at 73
- Sep 23 Jonkvrouw Catharina AM de Savornin Lohman, author, dies at 62
- Sep 24 William A. MacCorkle, American politician, 90th Governor of West Virginia, dies at 73
- Sep 28 Daniel Guggenheim, American mining magnate and philanthropist, dies at 74
- Sep 29 Ilya Repin, Ukrainian-Russian painter (Reply of the Zaporozhian Cossacks), dies at 86
- Oct 1 Ricardo Drigo, Italian composer, dies at 84
- Oct 3 Charles Louis Philippe Zilcken, Dutch painter and author (Bauer), dies at 73
- Oct 5 Christopher Birdwood Thomson, 1st Baron Thomson, British military officer (b. 1875)
- Oct 10 Adolf Engler, German botanist (b. 1844)
- Oct 14 Samuel van Houten, Dutch politician and philosopher (Child labor laws), dies at 93
- Oct 15 Ernest Wilson, English botanist (plant collector in China), dies in a car accident at 54
Herbert Henry Dow (1866-1930)
Oct 15 American chemical industrialist (Dow Chemical), dies from cirrhosis of the liver at 64
- Oct 24 Renaat Verheijen, Flemish actor and director (Dr Faustus), dies at 26
- Oct 26 Harry Payne Whitney, American businessman and thoroughbred horse breeder, dies at 58
- Oct 26 Waldemar Haffkine, Ukrainian bacteriologist (1st to develop and use vaccines against cholera and bubonic plague), dies at 70
- Oct 30 Sakichi Toyoda, Japanese inventor and industrialist (Toyota Industries), dies at 63
- Nov 2 Oliver Perry Hay, American paleontologist, dies at 84
Alfred Wegener (1880-1930)
Nov 3 German polar researcher and meteorologist (continental drift), dies while on an expedition to Greenland at 50 (date is approximate)
Christiaan Eijkman (1858-1930)
Nov 5 Dutch physician and bacteriologist (Nobel Prize in Medicine 1929), dies at 72
- Nov 11 William Whysall, British cricketer (4 Tests for England 1924-30), dies at 43
- Nov 27 Johnny Tyldesley, English cricket batsman (31 Tests, 4 x 100, 9 x 50, HS 138; Lancashire CCC), dies at 57
- Nov 30 Mother [Mary Harris] Jones, American labor organizer (cofounded Industrial Workers of the World), dies at 93
- Dec 9 Jim Slight, cricketer (represented Australia at Oval 1880), dies
- Dec 9 Rube Foster, American Baseball HOF manager and executive (Negro National League pennant 1920–22, 26; Chicago American Giants), dies from insanity at 51
- Dec 11 Friedrich von Bernhardi, German general and military historian (Germany & the Next War), dies at 80
- Dec 13 Fritz Pregl, Slovenian/Austrian chemist, Nobel laureate (b. 1869)
- Dec 17 Peter Warlock [Philip Heseltine], British composer, dies of a probable suicide at 36
Clarence Kummer (1899-1930)
Dec 18 American Racing HOF jockey (Preakness Stakes 1920, 25; Belmont Stakes 1920, 28; US Champion Jockey by earnings 1920), dies from pneumonia at 31
- Dec 19 Johnny Douglas, English cricket all-rounder, captain (23 Tests, 1 x 100, 45 wickets; Essex CCC) and boxer (Olympic gold middleweight 1908), dies by drowning at 48
- Dec 23 Johannes H. Been, Brielle archivist, dies at 71
- Dec 24 Eduard David, German politician (constitution of Weimar), dies at 67
- Dec 24 Oskar Nedbal, Czech composer, dies at 56
- Dec 25 Harvey Worthington Loomis, American composer (Lyrics of the Red Man), dies at 65
- Dec 27 William Courtleigh, Canadian actor (The Birth of Character, Ashes, The Nightingale), dies at 63