| Date | 8 July 1912 — 11:00 | |
|---|---|---|
| Location | Simstadion, Djurgårdsbrunnsviken, Stockholm | |
| Format | 300 metres freestyle. | |
| Pos | Competitor | NOC | Time | |||
|---|---|---|---|---|---|---|
| 1 | Ralph Clilverd |  GBR | 4:58.4 | |||
| 2 | Edmund Bernhardt |  AUT | 5:03.6 | |||
| 3 | Georg de Laval |  SWE | 5:28.0 | |||
| 4 | Gösta Åsbrink | SWE | 5:46.0 | |||
| 5 | Åke Grönhagen | SWE | 5:49.6 | |||
| 6 | Douglas Godfree | GBR | 5:54.0 | |||
| 7 | George Patton |  USA | 5:55.6 | |||
| 8 | Gustaf Wersäll | SWE | 5:56.2 | |||
| 9 | Sidney Stranne | SWE | 6:00.8 | |||
| 10 | Gösta Lilliehöök | SWE | 6:05.8 | |||
| 11 | Arno Almqvist |  RUS | 6:06.0 | |||
| 12 | Gustaf Lewenhaupt | SWE | 6:10.4 | |||
| 13 | Erik de Laval | SWE | 6:20.0 | |||
| 14 | Karl Mannström | SWE | 6:28.8 | |||
| 15 | Nils Haeggström | SWE | 6:35.8 | |||
| 16 | Carl Paaske |  NOR | 6:49.2 | |||
| 17 | Patrik de Laval | SWE | 6:54.4 | |||
| 18 | Georges Brulé |  FRA | 7:04.4 | |||
| 19 | Gunnar Hohenthal | RUS | 7:38.8 | |||
| 20 | Johannes Blom Ussing |  DEN | 7:40.4 | |||
| 21 | Henrik Norby | NOR | 7:48.6 | |||
| 22 | Theodor von Zeilau | DEN | 7:59.4 | |||
| 23 | Oskar Wilkman | RUS | 8:11.6 | |||
| 24 | Boris Nepokupnoy | RUS | 8:16.6 | |||
| 25 | Kalle Aejmelaeus | RUS | 8:59.8 | |||
| 26 | Kai Jølver | DEN | 9:32.6 | |||
| 27 | Jean de Mas Latrie | FRA | 10:03.0 | |||
| 28 | Hugh Durant | GBR | 10:07.0 | |||
| 29 | Vilhelm Laybourn | DEN | 12:09.6 |
