1927 was a free year.
January 7 - A regular transatlantic telephone connection is established between London and New York.
January 10 - The silent science fiction film Metropolis by Austrian director Fritz Lang premieres.
January 24 - US troops invade Nicaragua on the orders of President Calvin Coolidge, intervening in the Nicaraguan Civil War.
May 20 - By signing a peace treaty in Jeddah with King Ibn Saud, the United Kingdom recognizes Saudi sovereignty over Hijaz and Najd, which later merged into Saudi Arabia.
May 21 - American pilot Charles Lindbergh becomes the first axis to fly across the Atlantic Ocean on its own.
May 22 - A magnitude 8.3 earthquake shakes the Chinese city of Xining, killing at least 200,000 people.
August 1 - In the Nanchang Rebellion, the first major skirmish in the Chinese Civil War, the Communists take over the city of Nanchang from the Kuomintang.
September 11 - Elections for MPs of the Kingdom of Serbs, Croats and Slovenes.
December 14 - The United Kingdom recognizes Iraq's independence and supports the country's admission to the League of Nations.
January 17 - Erta Keith, American singer, actress, comedian, dancer and activist (prem. 2008)
February 20 - Sidney Poitier, American actor, director, producer and diplomat (prem. 2022)
February 20 - Iber de Givenchy, French aristocrat and fashion designer (prem. 2018)
February 24 - Emanuel Riva, French actress and poet (prem. 2017)
March 1 - Harry Belafonte, American musician and actor
March 2 - Rože Valkovjak, French cyclist (prem. 2017)
March 5 - Marko Valok, Serbian footballer and football coach
March 11 - Himzo Polovina, Bosnian musician (prem. 1986)
March 21 - Hans-Dietrich Genscher, German politician (prem. 2016)
March 21 - Virginia Weidler, American actress (prem. 1968)
March 23 - Sonja Hlebš, Slovenian actress (prem. 2005)
March 31 - William Daniels, American actor
April 2 - Ferenc Puskas, Hungarian footballer and football coach (prem. 2006)
April 3 - Eva Sekelj, Hungarian swimmer (prem. 2020)
April 16 - Pope Bene