- Aug 1 Canada begins replacing silver with nickel in coins
- Aug 1 Cleveland Metroparks begins operating Zoo
- Aug 1 WXIX TV channel 19 in Cincinnati-Newport, OH (IND) begins broadcasting
- Aug 1 The coronation is held of Hassanal Bolkiah, the 29th Sultan of Brunei.
- Aug 2 35th Chicago College All-Star Game: Green Bay 34, All-Stars 17, 69,917 at Soldier Field
- Aug 2 Ron Hansen (Washington) & Tim Cullen (Chicago WS) become the first MLB players to be traded for each other twice in the same season, they had been traded in February in opposite directions
- Aug 3 France performs nuclear test at Mururoa atoll
- Aug 4 100,000 attend Newport Pop Festival, Costa Mesa, California
- Aug 4 WXTV TV channel 41 in New York-Paterson, NY (UNI) begins broadcasting
- Aug 5 WMCV (now WZTV) TV channel 17 in Nashville, TN (IND) 1st broadcast
- Aug 8 Jarry Park is approved by Mayor Jean Drapeau for interim use by Expos
- Aug 8 Race riot in Miami, Florida
Presidential Convention
Aug 8 Republican convention in Miami Beach nominates Richard Nixon for president
Richard Nixon
- Aug 9 Yugoslav president Tito visits Prague
- Aug 10 Race riot in Miami, Chicago & Little Rock
- Aug 11 Beatles launch "Apple Records" label
- Aug 11 Satchel Paige (62) & needing 158 days on a major league payroll to qualify for a pension, is signed by Braves
- Aug 11 Fifteen Guinea Special - last main-line steam passenger train service in Britain. Selection of British Rail steam locomotives make a return 120-mile journey Liverpool to Carlisle, before having their fires dropped for the last time.
- Aug 14 Montreal Expos officially become a member of NL
- Aug 15 Pirate Radio Free London begins transmitting
Event of Interest
Aug 15 Romanian president Nicolae Ceausescu visits Prague
Nicolae Ceausescu
- Aug 15 USSR performs nuclear test at Sary Shagan USSR
- Aug 17 Dick Beyers (Dr X) beats Verne Gagne, to become NWA champ
- Aug 20 During the night 200,000 Warsaw Pact Soviet led troops invade Czechoslovakia in response to the Prague Spring
- Aug 20 USSR performs nuclear test at Eastern Kazakh/Semipalitinsk USSR
- Aug 21 After 5 years Soviet Union once again jams Voice of America radio
- Aug 21 Democratic Convention opens in Chicago, goes on to nominate Hubert Humphrey
- Aug 21 Marine James Anderson Jr is 1st African American to win Medal of Honor
- Aug 21 Warsaw Pact forces complete their invasion of Czechoslovakia by arresting the Czech leader Alexander Dubček and forcing him to sign the Moscow Protocols
- Aug 21 William Dana reaches 80 km (last high-altitude X-15 flight)
- Aug 22 1st papal visit to Latin America, Pope Paul VI arrives in Bogota to open a Eucharistic congress.
- Aug 22 The Society of Labour Lawyers (SLL) publishes an 'interim report' about alleged discrimination in Northern Ireland; the report is heavily criticised by unionists.
- Aug 23 Ringo quits Beatles over a disagreement (temporarily).
- Aug 23 Yanks & Tigers play 3-3 tie in 19 due to 1 AM curfew
- Aug 24 France becomes the world's fifth thermonuclear power with a detonation on Mururoa Atoll in the South Pacific
- Aug 24 Northern Ireland's first civil rights march held; many more marches would be held over the following year and Loyalists organized counter-demonstrations to get the marches banned
Event of Interest
Aug 25 Arthur Ashe becomes 1st African American to win the US singles championship
Arthur Ashe
- Aug 25 NY Yankee outfield Rocky Colavito pitches second 2/3 innings and beats Tigers 6-5; he played right field in second game and homered
- Aug 25 29th Venice Film Festival: "Artists Under the Big Top: Perplexed" directed by Alexander Kluge wins Golden Lion
- Aug 26 "Hey Jude" single released by the Beatles (Billboard Song of the Year 1968, Billboard 10th biggest song of all time 2013)
- Aug 27 Portest by the Derry Housing Action Committee (DHAC) at the Guildhall's council chamber; after which Eamon Melaugh phones the Northern Ireland Civil Rights Association (NICRA) to organise a march in Derry
- Aug 28 Police & anti-war demonstrators clash at Chicago's Democratic National Convention
- Aug 28 MP Gerry Fitt, tables House of Commons motion criticising Royal Ulster Constabulary at Dungannon "citizens of Northern Ireland should be allowed the same rights of peaceful demonstration as those in other parts of the United Kingdom"
Tennis Open
Aug 29 1st US Open tennis match (Billie Jean King beats Dr Vija Vuskains)
Billie Jean King
Music Concert
Aug 30 John Lennon and Yoko Ono's "One on One" benefit for children at Madison Square Garden, New York
John Lennon
Yoko Ono
Event of Interest
Aug 31 Private Eye magazine reports a John Lennon and Yoko Ono album will have a picture of them nude on cover
Yoko Ono