- Aug 2 Unsuccessful uprising of Macedonians against Turkey
- Aug 4 Giuseppe Sarto elected Pope Pius X, known as the 'pope of the poor and humble'
- Aug 4 Cardinal Giuseppe Sarto of Venice elected Pope Pius X
- Aug 7 Tommy Corcoran sets MLB record for shortstops when he records 14 assists in Cincinnati's 4 - 2 win v St. Louis Cardinals
- Aug 8 International Lawn Tennis Challenge, Boston, MA: Laurence Doherty beats William Larned 6-3, 6-8, 6-0, 2-6, 7-5 to give British Isles an unassailable 3-1 lead over US (ends 4-1)
- Aug 12 The Japanese Minister to Russia presents a note to the Russian Government protesting against its failure to evacuate Manchuria
Boxing Title Fight
Aug 14 Champion James J. Jeffries scores a 10th round TKO win over former champion James J Corbett in San Francisco; his 6th heavyweight boxing title defence
- Aug 15 New Zealand's All Blacks play their first Rugby Test Match against Australia's Wallabies at the Sydney Cricket Ground; New Zealand win 22-3
- Aug 17 Joe Pulitzer donates $1 million to Columbia University & begins the Pulitzer Prizes in America
- Aug 19 Philadelphia Phillies suffer record 9th straight postponed game
- Aug 23 6th Zionist Congres, Theodor Herzl declares Jewish state
- Aug 26 Phillies walk 17 Dodgers in a game
- Aug 26 US National Championship Men's Tennis, Newport, RI: Englishman Laurence Doherty beats American defending champion William Larned 6-0, 6-3, 10-8; first non-American champion
- Aug 29 The Finance Minister, Count Witte, is dismissed in what is seen as a victory for those in Russia who want their country to expand into Manchuria and Korea in defiance of the Japanese
- Aug 31 New York Giants future Baseball Hall of Fame pitcher Joe McGinnity wins his 3rd doubleheader of month, beating the Philadelphia Phillies, 4-1 and 9-2 at the Polo Grounds