- Jan 17 Operation Desert Storm begins, with US-led coalition forces bombing Iraq, during the Gulf War
- Feb 7 The IRA launches a mortar attack on 10 Downing Street during a cabinet meeting.
- Feb 28 Gulf War ends after Iraq accepts a ceasefire following their retreat from Kuwait
- Mar 3 Los Angeles police officers severely beat motorist Rodney King, the beating is famously captured on amateur video and later leads to riots when the police officers are acquitted
- Jun 19 Colombian drug lord Pablo Escobar surrenders to police
- Jul 10 Boris Yeltsin sworn in as 1st elected President of the Russian Federation
- Aug 6 Tim Berners-Lee releases files describing his idea for the World Wide Web. WWW debuts as a publicly available service on the Internet.
- Aug 19 Conservative members of the Communist Party of the Soviet Union attempt to depose Mikhail Gorbachev in a coup d'état
- Aug 21 Conservative coup in the Soviet Union is crushed by popular resistance led by Boris Yeltsin in three days
- Dec 12 Maastricht Treaty signed to create a European Community
Ötzi the Iceman, 3,300 BCE old mummy discovered by German tourists in Italian alps
On September 19, 1991