Event of Interest
Aug 5 First meeting of the Russian and Japanese peace commissioners takes place in US President Theodore Roosevelt's home at Oyster Bay, New York

Theodore Roosevelt
- Aug 6 26.7 cm rainfall at Princeton, Indiana (state record)
- Aug 12 King Leopold II opens Antwerp Central Station
- Aug 14 Ngindo-rebellion killed 5 RC German clergymen in East-Africa
- Aug 15 Philadelphia A's future Baseball Hall of Fame pitcher Rube Waddell no-hits St Louis Browns, 2-0 in 5 innings
- Aug 16 Mbunga-rebellion occupy German post Ifakara East-Africa
- Aug 17 Dutch government of Theo de Meester begins
Event of Interest
Aug 19 Russian Tsar Nicholas II installs "Imperial Duma", without legislative powers

Nicholas II
Event of Interest
Aug 20 Chinese revolutionary Sun Yat-sen forms the first chapter of T'ung Meng Hui, a union of all secret societies determined to bringing down the Manchus (Qing dynasty)

Sun Yat-sen
- Aug 24 Chicago Cubs beat Phillies 2-1 in 20 innings
- Aug 29 Pierre de Brazza leaves Brazzaville
- Aug 30 Pogoro/Ngindo attack Fort Mahenge German East-Africa
- Aug 30 Tiger Ty Cobb makes his debut, doubling off Yank Jack Chesbro
- Aug 31 Mbunga rebellion takes German Fort Mahenge East Africa
- Aug 31 25th US National Championship Men's Tennis, Newport, RI: Beals Wright beats defending champion Holcombe Ward 6-2, 6-1, 11-9 for his lone major singles title