| Date | 6 – 15 July 1912 | |
|---|---|---|
| Status | Olympic | |
| Location | Stockholms Olympiastadion, Stockholm | |
| Participants | 38 from 13 countries | |
| Format | Double-elimination tournament. When three or fewer wrestlers remained, they advanced to a final-round tournament. | |
In 1910 and 1911, there had been six different competitions considered as world championships, more properly called international meets. They had been won by Karl Wernicke (GER - 1910 in Düsseldorf), Antti Hyvönen (FIN - 1911 in Helsinki), Hans Lachnit (GER - 1911 in Stuttgart), Erich Kockel (GER - 1911 in Berlin), R. Walter (GER - 1911 in Dresden), and Heinrich Rauß (AUT - 1911 in Vienna). Of these, only Rauß competed in this event at Stockholm, but he was eliminated after four rounds. The winner was Kaarlo Koskelo, who never again competed at the Olympics, and never competed in a world or European championship. Finnish wrestlers dominated this class, taking the gold and bronze medal, and six of the top eight places.
| Date | 6 – 9 July 1912 |
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| Date | 9 – 11 July 1912 |
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| Date | 11 July 1912 |
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| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 11 Jul | Ville Lehmusvirta | FIN | Fall (5:00) | Mikael Hestdahl | NOR | |
| Match #2 | 11 Jul | Kalle Leivonen | FIN | Decision (1-00) | Erik Öberg | SWE | |
| Match #3 | 11 Jul | Josef Beránek | BOH | Decision (1-00) | Pavel Pavlovich | RUS | |
| Match #4 | 11 Jul | Arvid Beckman | SWE | Fall (2:00) | Christian Arnesen | NOR | |
| Match #5 | 11 Jul | Otto Lasanen | FIN | Fall (15:00) | Ragnvald Gullaksen | NOR | |
| Match #6 | 11 Jul | Arvo Kangas | FIN | Fall (4:00) | József Pongrácz | HUN | |
| Match #7 | 11 Jul | Harry Larsson | SWE | Fall (31:00) | Aleksandr Akondinov | RUS | |
| Match #8 | 11 Jul | Georg Gerstacker | GER | Decision (1-00) | Hugo Johansson | SWE | |
| Match #9 | 11 Jul | Lauri Haapanen | FIN | Fall (20:00) | Verner Hetmar | DEN | |
| Match #10 | 11 Jul | Carl-Georg Andersson | SWE | Fall (2:00) | António Pereira | POR | |
| Match #11 | 11 Jul | Kaarlo Koskelo | FIN | Decision (1-00) | Friedrich Scharrer | AUT | |
| Match #12 | 11 Jul | Heinrich Rauß | AUT |
| Date | 12 July 1912 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 12 Jul | Ville Lehmusvirta | FIN | Decision (1-00) | Heinrich Rauß | AUT | |
| Match #2 | 12 Jul | Kalle Leivonen | FIN | Fall (1:30) | Josef Beránek | BOH | |
| Match #3 | 12 Jul | Erik Öberg | SWE | ||||
| Match #4 | 12 Jul | Arvo Kangas | FIN | ||||
| Match #5 | 12 Jul | Otto Lasanen | FIN | Fall (45:00) | Harry Larsson | SWE | |
| Match #6 | 12 Jul | Hugo Johansson | SWE | ||||
| Match #7 | 12 Jul | Georg Gerstacker | GER | Fall (1:00) | Lauri Haapanen | FIN | |
| Match #8 | 12 Jul | Verner Hetmar | DEN | Fall (45:00) | Friedrich Scharrer | AUT | |
| Match #9 | 12 Jul | Kaarlo Koskelo | FIN | Fall (22:00) | Carl-Georg Andersson | SWE |
| Date | 13 July 1912 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 13 Jul | Erik Öberg | SWE | Decision (1-00) | Ville Lehmusvirta | FIN | |
| Match #2 | 13 Jul | Kalle Leivonen | FIN | Fall (49:00) | Harry Larsson | SWE | |
| Match #3 | 13 Jul | Otto Lasanen | FIN | Dq (both passivity) (1-00) | Hugo Johansson | SWE | |
| Match #4 | 13 Jul | Arvo Kangas | FIN | Fall (18:00) | Georg Gerstacker | GER | |
| Match #5 | 13 Jul | Kaarlo Koskelo | FIN | Fall (12:00) | Verner Hetmar | DEN | |
| Match #6 | 13 Jul | Lauri Haapanen | FIN |
| Date | 13 July 1912 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 13 Jul | Erik Öberg | SWE | Decision (1-30) | Lauri Haapanen | FIN | |
| Match #2 | 13 Jul | Georg Gerstacker | GER | Fall (57:00) | Ville Lehmusvirta | FIN | |
| Match #3 | 13 Jul | Otto Lasanen | FIN | Fall (3:00) | Kalle Leivonen | FIN | |
| Match #4 | 13 Jul | Kaarlo Koskelo | FIN | Fall (6:00) | Arvo Kangas | FIN |
| Date | 13 July 1912 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 13 Jul | Georg Gerstacker | GER | Decision (1-00) | Kalle Leivonen | FIN | |
| Match #2 | 13 Jul | Otto Lasanen | FIN | Fall (50:00) | Erik Öberg | SWE | |
| Match #3 | 13 Jul | Kaarlo Koskelo | FIN |
| Date | 13 July 1912 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 13 Jul | Georg Gerstacker | GER | Fall (2:13) | Otto Lasanen | FIN | |
| Match #2 | 13 Jul | Kaarlo Koskelo | FIN |
| Date | 15 July 1912 |
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| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 15 Jul | Kaarlo Koskelo | FIN | Decision | Otto Lasanen | FIN | |
| Match #2 | 15 Jul | Georg Gerstacker | GER |
| Date | 15 July 1912 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 15 Jul | Kaarlo Koskelo | FIN | Fall (24:00) | Georg Gerstacker | GER |