- Jan 30 State funeral of Winston Churchill at St Paul's Cathedral in London. Largest ever state funeral.
- Mar 18 Cosmonaut Aleksei Leonov, leaving his spacecraft Voskhod 2 for 12 minutes, becomes the first person to walk in space.
- Mar 22 US confirms its troops used chemical warfare against the Vietcong
- Mar 31 US orders first combat troops to Vietnam
- May 5 First large-scale US Army ground units arrive in South Vietnam
- Jun 7 The Supreme Court of the United States decides on Griswold v. Connecticut, effectively legalizing the use of contraception by married couples.
- Aug 6 US President Lyndon B. Johnson signs the Voting Rights Act prohibiting voting discrimination against minorities
- Aug 9 Singapore separates from the Federation of Malaysia and gains its independence
- Nov 27 1st French satellite launched; France becomes 3rd nation in space
- Dec 7 Pope Paul VI & Orthodox Patriarch Athenagoras I simultaneously lift mutual excommunications that led to split of 2 churches in 1054
One of the most popular musical films of all time, "The Sound of Music", starring Julie Andrews and Christopher Plummer, is released (Best Picture 1966)
On March 2, 1965