First Michelin Guide
Aug 1 The 1st Michelin Guide is published by the brothers Édouard and André Michelin as a hotel and restaurant reference guide to encourage more road travel and thus boost tire sales (exact date beyond Aug 1900 unknown)
- Aug 4 An allied expeditionary force, made up of Japanese, Russian, British, French and American troops, sets off from Tientsin for Peking, China, to put down Boxer rebellion
- Aug 5 In Russia, anti-Jewish riots spread from Odessa into other parts of the country
- Aug 7 Diamond workers in Amsterdam strike
- Aug 8 1st International Lawn Tennis Challenge (precursor to Davis Cup) begins at Longwood Cricket Club in Massachusetts, won 3-0 by US over British Isles
- Aug 9 1st International Lawn Tennis Challenge, Boston, MA: Dwight Davis & Holcombe Ward beat Ernest Black & Herbert Roper Barrett 6-4, 6-4, 6-4 to give US an unassailable 3-0 lead over British Isles
- Aug 14 1st electric tram in Netherland (Leidseplein-Brouwersgracht)
- Aug 15 Russian troops advance further unto Manchuria
- Aug 15 The Boxer Rebellion: In China, the Empress, her family and court retainers flee while foreign troops move through Peking in an attempt to quell the rebellion
- Aug 19 Start of first and only Olympic cricket match in Paris; GB beats France by 158 runs
- Aug 20 Great Britain beats France by 158 runs in Paris; cricket's only appearance at an Olympic Games
- Aug 20 Japan's primary school law is amended to provide for four years of mandatory schooling.
National Men's Championship
Aug 21 US National Championship Men's Tennis, Newport, RI: Malcolm Whitman beats William Larned 6-4, 1-6, 6-2, 6-2 to win his third straight US singles title
- Aug 23 National Negro Business League organizes (Boston)
Battle of Bergendal
Aug 27 Battle of Bergendal: General Buller defeats the Boer under General Louis Botha
- Aug 27 Gabriel Fauré's grand cantata "Prométhée" premieres at Arènes de Béziers, France; performance involved almost 800 singers and musicians (including two wind bands and 15 harps) and an audience of 10,000
- Aug 29 Gaetano Bresci, the assassin of King Umberto I of Italy, is tried and sentenced to life imprisonment; he will commit suicide in jail on 22 May 1901
- Aug 30 Last 2,000 British prisoners in Nooitgedagt, South Africa, freed
- Aug 31 British troops over run Johannesburg
- Aug 31 Brooklyn pitcher Brickyard Kennedy walks 6 straight Philadelphia Phillies in 2nd inning of the Superbas' 9-4 loss at Washington Park; Kennedy still achieves his 4th 20-win season
Admirals
Aviators
Gangsters
Generals
Industrialists
Suffragists