August 1 - Race riots in the United States spread to Washington, D.C..
August 2 – The Turkish football club Trabzonspor is established in Trabzon.
August 5 – Pink Floyd releases their debut album The Piper at the Gates of Dawn in the United Kingdom.
August 6 – A pulsar is noted by Jocelyn Bell and Antony Hewish. The discovery is first recorded in print in 1968: "An entirely novel kind of star came to light on Aug. 6 last year [...]". The date of the discovery is not recorded.
Vietnam War: The People's Republic of China agrees to give North Vietnam an undisclosed amount of aid in the form of a grant.
A general strike in the old quarter of Jerusalem protests Israel's unification of the city.
August 8 – The Association of Southeast Asian Nations (ASEAN) is founded in Bangkok, Thailand.
August 9 – Vietnam War – Operation Cochise: United States Marines begin a new operation in the Que Son Valley.
August 10 – Belgian mercenary Jean Schramme's troops take the Congolese border town of Bukavu.
August 13 - The first line-up of Fleetwood Mac makes their live debut at the Windsor Jazz and Blues Festival.
August 13 – Night of the Grizzlies sparks national concern over bear drama, from PBS in Montana's Glacier National Park.
August 14 – Wonderful Radio London shuts down at 3:00 PM in anticipation of the Marine Broadcasting Offences Act. Many fans greet the staff upon their return to London that evening with placards reading "Freedom died with Radio London."
August 15 – The United Kingdom Marine Broadcasting Offences Act declares participation in offshore pirate radio illegal. Radio Caroline defies the Act and continues broadcasting.
August 18 – The State of Tamil Nadu, India is established.
August 19 – West Germany receives 36 East German prisoners it has "purchased" through the border posts of Herleshausen and Wartha.
A truce is declared in the Democratic Republic of the Congo.
The People's Republic of China announces that it has shot down United States planes violating its airspace.
August 25 – American Nazi Party leader George Lincoln Rockwell is assassinated in Arlington, Virginia.
The East Coast Wrestling Association is established.
Beatles manager Brian Epstein is found dead in his locked bedroom.
August 30 – Thurgood Marshall is confirmed as the first African American Justice of the United States Supreme Court.
The Khmer–Chinese Friendship Association is banned in Cambodia.
Ilse Koch, known as the "Witch of Buchenwald", commits suicide in the Bavarian prison of Aichach.
Nguyễn Văn Thiệu is elected President of South Vietnam.
H-Day in Sweden: At 5:00 a.m. local time, all traffic in the country switches from left-hand traffic pattern to right-hand traffic.
September 4 – Vietnam War – Operation Swift: The United States Marines launch a search and destroy mission in Quảng Nam and Quảng Tín provinces. The ensuing 4-day battle in Que Son Valley kills 114 Americans and 376 North Vietnamese.
September 5 – The Prisoner has it's world broadcast premiere on the CTV Television Network in Canada.
September 10 – In a Gibraltar sovereignty referendum, only 44 out of 12,182 voters in the British Crown colony of Gibraltar support union with Spain.
A riot during a football match in Kayseri, Turkey leaves 44 dead, about 600 injured.
Jim Morrison and The Doors defy CBS censors on The Ed Sullivan Show, when Morrison sings the word "higher" from their #1 hit Light My Fire, despite having been asked not to.
September 18 – Love Is a Many Splendored Thing debuts on U.S. daytime television and is the first soap opera to deal with an interracial relationship. CBS censors find it too controversial and ask for it to be stopped, causing show creator Irna Phillips to quit.
September 27 – The RMS Queen Mary arrives in Southampton at the end of her last transatlantic crossing.
September 30 – In the United Kingdom, BBC Radio completely restructures its national programming: the Light Programme is split between new national pop station Radio 1 (modelled on the successful pirate station Radio London) and Radio 2; the cultural Third Programme is rebranded as Radio 3; and the primarily-talk Home Service becomes Radio 4.
October 3 – An X-15 research aircraft with test pilot William J. Knight establishes an unofficial world fixed-wing speed record of Mach 6.7.
Omar Ali Saifuddin III of Brunei abdicates in favour of his son, His Majesty Sultan Hassanal Bolkiah.
The Shag Harbour UFO incident occurs.
October 6 – Southern California's Pacific Ocean Park closes down, known as the "Disneyland By The Sea".
October 8 – Guerrilla leader Che Guevara and his men are captured in Bolivia; they are executed the following day.
Vietnam War: U.S. Secretary of State Dean Rusk states during a news conference that proposals by the U.S. Congress for peace initiatives are futile, because of North Vietnam's opposition.
Desmond Morris publishes The Naked Ape.
October 14 – Quebec Nationalism: René Lévesque leaves the Liberal Party.
October 16 – Thirty-nine people, including singer-activist Joan Baez, are arrested in Oakland, California, for blocking the entrance of that city's military induction center.
The musical Hair opens off-Broadway. It moves to Broadway the following April.
Vietnam War: Battle of Ong Thanh
Vietnam War: Students at the University of Wisconsin-Madison protest over recruitment by Dow Chemical on the University campus; 76 are injured in the resulting riot.
Walt Disney's 19th full-length animated feature The Jungle Book, the last animated film personally supervised by Disney, is released and becomes an enormous box-office and critical success. On a double bill with the film is the (now) much less well-known true-life adventure, Charlie the Lonesome Cougar.
The Venera 4 probe descends through the Venusian atmosphere.
October 19 – The Mariner 5 probe flies by Venus.
October 20 - Patterson–Gimlin film: Roger Patterson and Robert Gimlin's famous film of an unidentified animate cryptid, thought to be Bigfoot or Sasquatch, is recorded at Bluff Creek, California.
Tens of thousands of Vietnam War protesters march in Washington, D.C.; Allen Ginsberg symbolically chants to 'levitate' The Pentagon.
An Egyptian surface-to-surface missile sinks the Israeli destroyer Eilat, killing 47 Israeli sailors. Israel retaliates by shelling Egyptian refineries along the Suez Canal.
October 25 – An abortion bill passes in the British Parliament.
Shah Mohammad Reza Pahlavi of Iran is officially crowned.
U.S. Navy pilot John McCain is shot down over North Vietnam and made a POW. His capture will be announced in the NY Times and Washington Post two days later.
Charles De Gaulle vetoes British entry into the European Economic Community again.
London criminal Jack McVitie is murdered by the Kray twins, leading to their eventual imprisonment and downfall.
Mobutu's troops launch an offensive against mercenaries in Bukavu, Congo.
The Montreal, Quebec Expo 67 closes, having received over 50 million attendees.
October 30 – Hong Kong 1967 riots: British troops and Chinese demonstrators clash on the border of China and Hong Kong.