Athletics at the 1920 Summer Olympics – Men's marathon
The men's marathon event was part of the track and field athletics programme at the 1920 Summer Olympics. The distance of this race was 42.75 kilometres. The competition was held on Sunday, 22 August 1920.
48 runners from 17 nations competed.
The weather during the race has been described as "cool". An Associated Press report described the weather as "cold and showery", but "fine running weather for the marathoners".Records
These were the standing world and Olympic records prior to the 1920 Summer Olympics.
| World Record | 2:36:07 |  Alexis Ahlgren | London | 31 May 1913 |
| Olympic Record | 2:36:54.8' |  Ken McArthur | Stockholm | 14 July 1912 |
' Distance was 40.2 kilometres
Hannes Kolehmainen is recognized as having set a new world best with a time of 2:32:35.8 hours. Although the course distance was officially reported to be 42,750 meters/26.56 miles, the Association of Road Racing Statisticians estimated the course to be only 40 km.Results
| Place | Athlete | Time |
| 1 | | 2:32:35.8 WR |
| 2 | | 2:32:48.6 |
| 3 | | 2:36:32.8 |
| 4 | | 2:39:25.8 |
| 5 | | 2:40:18.8 |
| 6 | | 2:41:18.0 |
| 7 | | 2:41:30.0 |
| 8 | | 2:41:39.4 |
| 9 | | 2:42:40.0 |
| 10 | | 2:44:02.3 |
| 11 | | 2:44:21.2 |
| 12 | | 2:45:30.0 |
| 13 | | 2:46:47.0 |
| 14 | | 2:48:05.0 |
| 15 | | 2:48:30.0 |
| 16 | | 2:48:45.4 |
| 17 | | 2:49:10.4 |
| 18 | | 2:50:00.2 |
| 19 | | 2:50:45.4 |
| 20 | | 2:51:09.4 |
| 21 | | 2:57:02.0 |
| 22 | | 2:58:01.0 |
| 23 | | 2:59:23.0 |
| 24 | | 2:59:37.0 |
| 25 | | 3:00:04.0 |
| 26 | | 3:00:17.0 |
| 27 | | 3:00:51.0 |
| 28 | | 3:01:48.0 |
| 29 | | 3:02:10.0 |
| 30 | | 3:03:27.0 |
| 31 | | 3:14:25.0 |
| 32 | | 3:14:25.0 |
| 33 | | 3:17:47.0 |
| 34 | | 3:20:00.0 |
| 35 | | 3:55:00.0 |
| — | | DNF |
| — | | DNF |
| — | | DNF |
| — | | DNF |
| — | | DNF |
| — | | DNF |
| — | | DNF |
| — | | DNF |
| — | | DNF |
| — | | DNF |
| — | | DNF |
| — | | DNF |
| — | | DNF |
