| Final | time | | 1. Robert Kerr |  Canada | 22.6s | | 2. Robert Cloughen |  United States | (22.6s) | | 3. Nate Cartmell | United States | (22.7s) | | 4. George Hawkins |  Great Britain | (22.9s) |
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| | | Venue: White City Stadium. | | 43 competitors from 15 nations. |
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| World Record: 21.4s - Jim Maybury - Chicago (USA), 5 June 1897 | Olympic Record: 21.6s - Archie Hahn - St. Louis (USA), 31 August 1904 |
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Semifinals - Wednesday, 22nd July. | | Winner of each of 4 Semis advanced to Final. |
| Semi 1 | time | | 1. Robert Kerr | Canada | 22.6s | | 2. William Hamilton | United States | (22.7s) | | 3. Károly Radóczy |  Hungary | (22.8s) | | 4. Oscar Guttormsen |  Norway | Unknown |
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| Semi 2 | time | | 1. Nate Cartmell | United States | 22.6s | | 2. Nathaniel Sherman | United States | (22.9s) | | 3. Harold Huff | United States | (23.0s) |
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| Semi 3 | time | | 1. Robert Cloughen | United States | 22.6s | | 2. Lionel Reed | Great Britain | (22.8s) | | 3. John George | Great Britain | Unknown | | 4. Samuel Hurdsfield | Great Britain | Unknown |
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| Semi 4 | time | | 1. George Hawkins | Great Britain | 22.6s | | 2. Patrick Roche | Great Britain | (22.6s) | | 3. Georges Malfait |  France | Unknown | | -. Sven Låftman |  Sweden | DNS |
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Heats - Tuesday, 21st July. | | Winners of each of 15 Heats advanced to Semifinals. |
| Heat 1 | time | | 1. John George | Great Britain | 23.4s | | 2. Victor Henny |  Netherlands | (24.6s) |
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| Heat 2 | time | | 1. Harold Huff | United States | 22.8s | | 2. Edward Duffy |  South Africa | (23.2s) | | 3. Henk van der Wal | Netherlands | Unknown | | 4. Knut Stenborg | Sweden | Unknown |
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| Heat 3 | time | | 1. Patrick Roche | Great Britain | 22.8s | | 2. Lawson Robertson | United States | (23.0s) | | 3. Frank Lukeman | Canada | Unknown | | 4. Evert Koops | Netherlands | Unknown |
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| Heat 4 | time | | 1. Nate Cartmell | United States | 23.0s | | 2. Vilmos Rácz | Hungary | (23.3s) | | 3. Ragnar Stenberg |  Finland | Unknown |
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| Heat 5 | time | | 1. Georges Malfait | France | 22.6s | | 2. Robert Duncan | Great Britain | (23.1s) |
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| Heat 6 | time | | 1. Sven Låftman | Sweden | 23.8s | | 2. Frigyes Wiesner | Hungary | (24.0s) | | 3. Ernst Greven | Netherlands | Unknown |
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| Heat 7 | time | | 1. Károly Radóczy | Hungary | walkover |
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| Heat 8 | time | | 1. Robert Cloughen | United States | 23.4s | | 2. Umberto Barrozzi |  Italy | (24.1s) |
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| Heat 9 | time | | 1. Samuel Hurdsfield | Great Britain | 23.6s | | 2. Mikhail Paskalides |  Greece | (24.0s) |
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| Heat 10 | time | | 1. William Hamilton | United States | 22.4s | | 2. Louis Sebert | Canada | (22.8s) | | 3. Henry Pankhurst | Great Britain | Unknown | | 4. Pál Simon | Hungary | Unknown | | 5. Fernand Halbart |  Belgium | Unknown |
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| Heat 11 | time | | 1. Robert Kerr | Canada | 22.2s | | 2. William W. May | United States | (22.7s) | | 3. James P. Stark | Great Britain | Unknown | | 4. Knut Lindberg | Sweden | Unknown | | 5. Emilio Brambilla | Italy | Unknown |
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| Heat 12 | time | | 1. Nathaniel Sherman | United States | 22.8s | | 2. John W. Morton | Great Britain | (23.1s) | | 3. Eduard Schönecker |  Austria | Unknown | | 4. Cornelis den Held | Netherlands | Unknown |
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| Heat 13 | time | | 1. Lionel Reed | Great Britain | 23.2s | | 2. Arthur Hoffmann |  Germany | (23.5s) |
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| Heat 14 | time | | 1. Oscar Guttormsen | Norway | walkover |
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| Heat 15 | time | | 1. George Hawkins | Great Britain | 22.8s | | 2. Henri Meslot | France | (23.2s) | | 3. Jacobus Hoogveld | Netherlands | Unknown |
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