1918 was a common year starting on Tuesday in the Gregorian calendar, and a common year starting on Monday in the Julian calendar.

Births 
 January 2 – Gudrun Zapf-von Hesse, German type designer and educator
 January 15 – Gamal Abdel Nasser, 2nd President of Egypt (d. 1970)
 February 22 – Robert Wadlow, American record holder, world's tallest man (d. 1940)
 February 26 – Otis R. Bowen, American politician, Governor of Indiana from 1973 to 1981 (d. 2013)
 March 5 – James Tobin, American economist (d. 2002)
 March 29 – Sam Walton, American businessman, Wal-Mart (d. 1992)
 April 8 – Betty Ford, American First Lady, wife of Gerald Ford (d. 2011)
 May 25 – Edith Massey, American actress (d. 1984)
 July 4 – Ann Landers, American writer and advice columnist (d. 2002)
 July 14 – Ingmar Bergman Swedish movie director
 July 18 – Nelson Mandela, South African prisoner of conscience and president (d. 2013)
 August 25 – Leonard Bernstein, American composer and conductor (d. 1990)
 September 4 – Paul Harvey, American radio host
 October 4 – Kenichi Fukui, Japanese chemist
 October 17 – Rita Hayworth, American actress (d. 1987)
 October 18 – Molly Geertsema, Dutch liberal politician, former leader of the VVD party (d. 1992)
 November 7 – Billy Graham, American religious leader (d. 2018)
 November 9 – Spiro Agnew, 39th Vice President of the United States (d. 1996)
 November 29 – Madeleine L'Engle, American writer (d. 2007)
 November 30 - Efrem Zimbalist, Jr., American actor (d. 2014)
 December 21 – Kurt Waldheim, President of Austria, Secretary-General of the United Nations (d. 2007)
 December 23 – Helmut Schmidt, Chancellor of Germany from 1974 to 1982 (d. 2015)

Deaths 
 January 6 – Georg Cantor, German mathematician (b. 1845)
 January 9 – Émile Reynaud, French science teacher and maker of the first animated movies (b. 1844)
 January 28 – John McCrae, Canadian soldier and poet (b. 1872)
 February 6 – Gustav Klimt, Austrian painter (b. 1862)
 February 10 – Ernesto Teodoro Moneta, Italian pacifist, recipient of the Nobel Peace Prize (b. 1833)
 March 13 – César Cui, Lithuanian composer (b. 1835)
 March 25 – Claude Debussy, French composer (b. 1862)
 March 27 – Henry Adams, American historian (b. 1838)
 April 20 – Karl Ferdinand Braun, German physicist, Nobel Prize laureate (b. 1850)
 April 21 – Manfred von Richthofen, "Red Baron", German World War I pilot (b. 1892)
 May 14 – James Gordon Bennett, Jr., American newspaper publisher (b. 1841)
 May 19 – Raoul Lufbery, American World War I pilot (b. 1885)
 June 10 – Arrigo Boito, Italian poet and composer (b. 1842)
 July 3 – Sultan Mehmed V of the Ottoman Empire (b. 1844)
 July 17 – Tsar Nicholas II | Nicholas II  Alix of Hesse of Russia  (b. 1868) and his family (executed)
 August 1 – John Riley Banister, law officer, cowboy, and Texas Ranger (b. 1854)
 August 18 – Henry Norwest, Canadian World War I sniper (b. 1884)
 September 3 - Fanya Kaplan, attempted assassin of Vladimir Lenin (b. 1890)
 September 12 – George Reid, fourth Prime Minister of Australia (b. 1845)
 September 28 – Georg Simmel, German sociologist and philosopher (b. 1858)
 October 15 – Sai Baba of Shirdi, Indian saint (b. 1838)
 October 22 – Myrtle Gonzalez, American stage and screen actress (b. 1891)
 November 4 – Wilfred Owen, English poet (killed in action) (b. 1893)
 November 9 – Guillaume Apollinaire, French poet (b. 1880)
 November 19 – Joseph Fielding Smith, president of The Church of Jesus Christ of Latter-day Saints (b. 1838)

Events 
 November 11 – The Armistice ends World War I
 Fire Brigades Union founded in London
 Çanakkale Conquest
 End of German Empire
 End of Austria-Hungary
 End of German colonial Empire
 Foundation of Royal Air Force
 The Influenza pandemic of 1918 affected the United States, then lead to the world, which result to 100 million of people dead. The economic could have have dropped half of the percent in the world.