| Venue: Empire Stadium, London. |
| Final | time | +time | L | t.a. | Y | | 1. Harrison Dillard |  USA | 10.3s | | 6 | 10.3 | 25 | | 2. Barney Ewell | USA | 10.4s | +0.06s | 2 | 10.4 | 30 | | 3. Lloyd LaBeach |  PAN | 10.6s | +0.09s | 3 | 10.6 | 26 | | 4. Alastair McCorquodale |  GBR | | +0.11s | 4 | | 22 | | 5. Mel Patton | USA | | +0.17s | 1 | | 23 | | 6. Bailey McDonald | GBR | | +0.31s | 5 | | 27 |
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| | | First 3 from each 2 semi-finals progressed to Final. |
| Semi 1 | time | +time | t.a. | Y | | 1. Harrison Dillard | USA | 10.5s | | 10.5 | 25 | | 2. Barney Ewell | USA | 10.5s | +0.03s | 10.5 | 30 | | 3. Alastair McCorquodale | GBR | 10.7s | +0.21s | 10.7 | 22 | | 4. John Bartram |  AUS | | +0.38s | | 23 | | 5. Juan López |  URU | | +0.45s | | 22 | | 6. Morris Curotta | AUS | | +0.55s | | 19 |
| Semi 2 | time | +time | t.a. | Y | | 1. Mel Patton | USA | 10.4s | | 10.6 | 23 | | 2. Lloyd LaBeach | PAN | 10.5s | +0.02s | | 26 | | 3. Bailey McDonald | GBR | 10.6s | +0.11s | | 27 | | 4. John Treloar | AUS | | +0.14s | | 20 | | 5. Rafael Fortún |  CUB | | +0.22s | | 28 | | 6. Ken Jones | GBR | | +0.41s | | 26 |
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| | | First 3 from each 4 quarter-finals progressed to Semi-Finals. |
| Quarter 1 | time | +time | Y | | 1. Harrison Dillard | USA | 10.4s | &s | 25 | | 2. Juan López | URU | 10.6s | +0.24s | 22 | | 3. Ken Jones | GBR | 10.7s | +0.25s | 26 | | 4. Ivan Hausen |  BRA | | +0.43s | 20 | | 5. Ted Haggis |  CAN | | +0.47s | | | 6. Nuno Morais |  POR | | +0.82s | 25 |
| Quarter 2 | time | +time | t.a. | Y | | 1. Barney Ewell | USA | 10.5s | | 10.7 | 30 | | 2. Bailey McDonald | GBR | 10.6s | +0.20 | | 27 | | 3. Morris Curotta | AUS | 10.8s | +0.23 | | 19 | | 4. Georgie Lewis |  TTO | | +0.34 | | 31 | | 5. Goldoványi Béla |  HUN | | +0.41 | | 22 | | 6. Haukur Clausen |  ISL | | +0.48 | | 19 |
| Quarter 3 | time | +time | t.a. | Y | | 1. Mel Patton | USA | 10.4s | | 10.6 | 23 | | 2. Alastair McCorquodale | GBR | 10.5s | +0.04 | | 22 | | 3. John Bartram | AUS | 10.6s | +0.17 | | 23 | | 4. René Valmy |  FRA | | +0.22 | | 27 | | 5. Mario Fayos | URU | | +0.48 | | 21 | | 6. Isidoor Van De Wiele |  BEL | | +0.50 | | 23 |
| Quarter 4 | time | +time | t.a. | Y | | 1. Lloyd LaBeach | PAN | 10.5s | &s | 10.7 | 26 | | 2. John Treloar | AUS | 10.5s | +0.04s | | 20 | | 3. Rafael Fortún | CUB | 10.6s | +0.05s | | 28 | | 4. Aroldo da Silva | BRA | | +0.34s | | 18 | | 5. Gerardo Bönnhoff |  ARG | | +0.39s | | 22 | | 6. Eric Prabhakar |  IND | | +0.56s | | 23 |
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| Heat 1 | time | +time | t.a. | Y | | 1. Barney Ewell | USA | 10.5s | &s | 10.7 | 30 | | 2. Alastair McCorquodale | GBR | 10.5s | +0.03 | | 22 | | 3. Les Laing |  JAM | 11.0s | +0.36 | | 23 | | 4. Angel García | CUB | | +0.52 | | 28 | | 5. Nestor Jacono |  MLT | | +0.81 | | 23 |
| Heat 2 | time | +time | t.a. | Y | | 1. Mel Patton | USA | 10.6s | | 10.7 | 23 | | 2. Ivan Hausen | BRA | 10.9s | +0.24 | | 20 | | 3. Jim O'Brien | CAN | 10.9s | +0.42 | | | | 4. Fernando Lapuente | ARG | | +0.46 | | 20 | | 5. Hector Gosset | BEL | | +0.80 | | 21 | | 6. Guillermo Rodríguez |  MEX | | +1.27 | | |
| Heat 3 | time | +time | t.a. | Y | | 1. Lloyd LaBeach | PAN | 10.5s | | 10.7 | 26 | | 2. Goldoványi Béla | HUN | 11.0s | +0.33 | | 22 | | 3. Frank Mahoney |  BER | 11.8s | +1.24 | | |
| Heat 4 | time | +time | t.a. | Y | | 1. Juan López | URU | 10.5s | | 10.7 | 22 | | 2. Ken Jones | GBR | 10.6s | +0.04 | | 26 | | 3. Jan Meijer |  NED | 11.0s | +0.31 | | 27 | | 4. Reyes Máximo |  PER | | +0.34 | | 19 | | 5. Finnbjörn Þorvaldsson | ISL | | +0.53 | | 24 |
| Heat 5 | time | +time | t.a. | Y | | 1. Harrison Dillard | USA | 10.4s | | 10.7 | 25 | | 2. Aroldo da Silva | BRA | 10.6s | +0.24 | | 18 | | 3. Peter Bloch |  NOR | 11.1s | +0.50 | | 25 | | 4. Pol Braekman | BEL | | +0.60 | | 28 |
| Heat 6 | time | +time | t.a. | Y | | 1. Bailey McDonald | GBR | 10.5s | &s | 10.7 | 27 | | 2. Haukur Clausen | ISL | 11.0s | +0.19s | | 19 | | 3. Abram van Heerden |  RSA | 11.1s | +0.31s | | 20 | | 4. Carlos Silva |  CHI | | +0.38s | | 21 | | 5. Bernabe Lovina |  PHI | | +0.62s | | 27 | | 6. Stanley Lines | BER | | +0.99s | | |
| Heat 7 | time | +time | t.a. | Y | | 1. John Treloar | AUS | 10.5s | | 10.6 | 20 | | 2. René Valmy | FRA | 10.8s | +0.20s | | 27 | | 3. György Csányi | HUN | 11.1a | +0.51s | | 26 | | 4. Carlos Isaac | ARG | | +0.64s | | 24 | | 5. Sayed Moukhtar |  EGY | | +1.11s | | | | 6. Ali Salman |  IRQ | | +1.30s | | |
| Heat 8 | time | +time | t.a. | Y | | 1. Rafael Fortún | CUB | 10.7s | | 10.8 | 28 | | 2. John Bartram | AUS | 10.8s | +0.09 | | 23 | | 3. Basil McKenzie | JAM | 10.8s | +0.12 | | | | 4. Hélio da Silva | BRA | | +0.29 | | 24 | | 5. Jo Zwaan | NED | | +0.29 | | 25 |
| Heat 9 | time | +time | t.a. | Y | | 1. Morris Curotta | AUS | 10.7s | | 10.8 | 19 | | 2. Gerardo Bönnhoff | ARG | 10.8s | +0.03 | | 22 | | 3. Raúl Mazorra | CUB | 11.1s | +0.34 | | 19 | | 4. Clausen Örn | ISL | | +0.42 | | 19 | | 5. Raşit Öztaş |  TUR | | +0.55 | | | | -. Perry Johnson | BER | DQ | | | |
| Heat 10 | time | +time | t.a. | Y | | 1. Georgie Lewis | TTO | 10.8s | | 11.0 | 31 | | 2. Ted Haggis | CAN | 10.9s | +0.09 | | | | 3. Walter Pérez | URU | 11.0s | +0.13 | | 23 | | 4. Santiago Ferrando | PER | | +0.19 | | 20 | | 5. Stefanos Petrakis |  GRE | | +0.62 | | 23 |
| Heat 11 | time | +time | t.a. | Y | | 1. Isidoor Van De Wiele | BEL | 10.8ws | | 11.1w | 23 | | 2. Nuno Morais | POR | 10.9ws | +0.03w | | 25 | | 3. Alberto Labarthe | CHI | 11.0ws | +0.06w | | 20 | | 4. Muhammad Sharif Butt |  PAK | | +0.13w | | 22 | | 5. Charles Thompson |  GUY | | | | |
| Heat 12 | time | +time | t.a. | Y | | 1. Mario Fayos | URU | 11.0s | | 11.1 | 21 | | 2. Eric Prabhakar | IND | 11.0s | +0.12 | | 23 | | 3. Bartha László | HUN | 11.1s | +0.15 | | 23 | | 4. Jan Kleyn | NED | | +0.26 | | 23 | | 5. Kemal Aksur | TUR | | +0.35 | | 24 | | 6. Maung Sein Pe |  MYA | | +0.68 | | | | -. Bally Étienne | FRA | DNF | | | 25 |
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