Athletics at the 1920 Summer Olympics – Men's 110 metres hurdles
The men's 110 metres hurdles event was part of the track and field athletics programme at the 1920 Summer Olympics. The competition was held on Tuesday, August 17, 1920 and on Wednesday, August 18, 1920. 24 runners from 15 nations competed.Records
These were the standing world and Olympic records prior to the 1920 Summer Olympics.
| World Record | 15.0 |  Forrest Smithson | London | July 25, 1908 |
| Olympic Record | 15.0 | Forrest Smithson | London | July 25, 1908 |
In the semi-finals, Harold Barron and Earl Thomson equalled the world record with 15.0 seconds. In the final, Earl Thomson set a new world record with 14.8 seconds.Results
Quarterfinals
Quarterfinal 1
| Place | Athlete | Time | Qual. |
| 1 | | 15.6 | Q |
| 2 | | 15.8 | Q |
| 3 | | 15.9 | |
| 4 | | | |
Quarterfinal 2
| Place | Athlete | Time | Qual. |
| 1 | | 15.2 | Q |
| 2 | | 15.4 | Q |
| 3 | | | |
| 4 | | | |
Quarterfinal 3
| Place | Athlete | Time | Qual. |
| 1 | | 15.8 | Q |
| 2 | | | Q |
| 3 | | | |
| 4 | | | |
| 5 | | | |
Quarterfinal 4
| Place | Athlete | Time | Qual. |
| 1 | | 16.8 | Q |
| 2 | | | Q |
| — | | DNF | |
Quarterfinal 5
| Place | Athlete | Time | Qual. |
| 1 | | 15.6 | Q |
| 2 | | | Q |
| 3 | | | |
| 4 | | | |
Quarterfinal 6
| Place | Athlete | Time | Qual. |
| 1 | | 15.8 | Q |
| 2 | | | Q |
| 3 | | | |
| 4 | | | |
Semifinals
Semifinal 1
| Place | Athlete | Time | Qual. |
| 1 | | 15.0 | Q =WR |
| 2 | | 15.2 | Q |
| 3 | | 15.3 | Q |
| 4 | | | |
| 5 | | | |
| 6 | | | |
Semifinal 2
| Place | Athlete | Time | Qual. |
| 1 | | 15.0 | Q =WR |
| 2 | | 15.2 | Q |
| 3 | | 15.2 | Q |
| 4 | | | |
| 5 | | | |
| 6 | | | |
Final
The final was held on Wednesday, August 18, 1920.
| Place | Athlete | Time |
| 1 | | 14.8 WR |
| 2 | | 15.1 |
| 3 | | 15.1 |
| 4 | | 15.2 |
| 5 | | 15.3 |
| 6 | | 15.3 |
