- Jan 1 Mikhail Drozdovsky, Russian general, dies at 39
- Jan 4 Georg von Hertling, Chancellor of Germany (1917-18), dies at 75
Theodore Roosevelt
Jan 6 Theodore Roosevelt, 26th US President (R: 1901-09; Nobel 1906), dies in NY at 60
- Jan 6 Max Heindel, Danish-American Christian occultist, astrologer and mystic, dies at 54
- Jan 7 Henry Ware Eliot, American industrialist, philanthropist and the father of T. S. Eliot, dies at 75
- Jan 8 Peter Altenberg, writer, dies at 59
- Jan 15 Karl Liebknecht, German Marxist revolutionary (Sparta Party), murdered at 47
- Jan 15 Rosa Luxemburg, Polish-German Marxist revolutionary and founder of the Spartacus League, murdered by the Freikorps at 47
- Jan 16 Jaroslav Jeremiáš, Czech pianist and composer, dies at 19
- Jan 16 Francisco de Paula Rodrigues Alves, President of Brazil (b. 1848)
- Jan 18 Prince John of the United Kingdom, youngest son of English king George V, dies at 13
- Jan 21 Gojong, Emperor Gwangmu of Korea (1897-1907), dies at 66
- Jan 22 Carl Larsson, Swedish painter (Midwinter Sacrifice - Swedish National Museum of Fine Arts), dies at 65
- Jan 27 Endre Ady, Hungarian lyric poet (Még egyzer, Uj versek), dies from complications related to alcoholism at 41
- Jan 30 Sam Steele, Canadian soldier, dies from influenza at 71
- Jan 31 Paul Lindau, German playwright/critic (Estimate), dies at 79