Athletics at the 1980 Summer Olympics – Men's 400 metres
These are the official results of the Men's 400 metres event at the 1980 Summer Olympics in Moscow. The competition was held from July 27, 1980 and on July 30, 1980.Final
Semifinals
| Rank | Athlete | Nation | Time | Notes |
| 1 | Fons Brijdenbach | | 45.46 | - |
| 2 | Rick Mitchell | | 45.48 | - |
| 3 | David Jenkins | | 45.59 | - |
| 4 | Mike Solomon | | 45.61 | - |
| 5 | Dele Udo | | 45.88 | - |
| 6 | Nikolay Chernetskiy | | 45.94 | - |
| 7 | Mauro Zuliani | | 46.01 | - |
| 8 | Karel Kolář | | 46.11 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | Frank Schaffer | | 45.47 | - |
| 2 | Viktor Markin | | 45.60 | - |
| 3 | Alberto Juantorena | | 45.95 | - |
| 4 | Joseph Coombs | | 45.96 | - |
| 5 | Viktor Burakov | | 45.97 | - |
| 6 | Didier Dubois | | 46.72 | - |
| 7 | Jens Smedegaard Hansen | | 47.00 | - |
| 8 | Alan Bell | | 48.50 | - |
Quarterfinals
The quarter finals were held on 28 July 1980. The top four in each heat advanced to the semi finals.
| Rank | Athlete | Nation | Time | Notes |
| 1 | Rick Mitchell | | 45.73 | - |
| 2 | Fons Brijdenbach | | 45.88 | - |
| 3 | Jens Smedegaard Hansen | | 45.89 | - |
| 4 | Dele Udo | | 46.18 | - |
| 5 | Francis Demarthon | | 46.38 | - |
| 6 | Jozo Alebić | | 46.60 | - |
| 7 | Charles Lupiya | | 47.67 | - |
| 8 | Stefano Malinverni | | 47.79 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | Viktor Markin | | 45.58 | - |
| 2 | Joseph Coombs | | 45.81 | - |
| 3 | Mauro Zuliani | | 45.93 | - |
| 4 | Alan Bell | | 46.17 | - |
| 5 | Andrzej Stępień | | 46.31 | - |
| 6 | Eddy De Leeuw | | 46.47 | - |
| 7 | Derrick Peynado | | 46.50 | - |
| 8 | Marcel Klarenbeek | | 46.81 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | Frank Schaffer | | 46.15 | - |
| 2 | Alberto Juantorena | | 46.23 | - |
| 3 | Viktor Burakov | | 46.23 | - |
| 4 | Didier Dubois | | 46.60 | - |
| 5 | Silver Ayoo | | 47.03 | - |
| 6 | Bert Cameron | | 47.31 | - |
| 7 | Glen Cohen | | 47.35 | - |
| 8 | Jacques Borlée | | 47.73 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | David Jenkins | | 45.99 | - |
| 2 | Mike Solomon | | 46.12 | - |
| 3 | Karel Kolář | | 46.27 | - |
| 4 | Nikolay Chernetskiy | | 46.30 | - |
| 5 | Roberto Tozzi | | 46.73 | - |
| 6 | Hope Ezeigbo | | 46.88 | - |
| 7 | Ian Stapleton | | 47.64 | - |
| 8 | Hussain Ali Nasayyif | | 48.50 | - |
Round one
Eight Round One heats were held at the Lenin Stadium on Sunday 27 July 1980. The first four in each heat progressed to the Quarter Finals.
| Rank | Athlete | Nation | Time | Notes |
| 1 | David Jenkins | | 46.67 | - |
| 2 | Karel Kolář | | 47.26 | - |
| 3 | Francis Demarthon | | 47.43 | - |
| 4 | Eddy De Leeuw | | 47.59 | - |
| 5 | Charles Dramiga | | 48.69 | - |
| 6 | Asfaw Deble | | 49.77 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | Bert Cameron | | 47.54 | - |
| 2 | Didier Dubois | | 47.57 | - |
| 3 | Silver Ayoo | | 47.78 | - |
| 4 | Charles Lupiya | | 48.49 | - |
| 5 | Horia Toboc | | 49.90 | - |
| 6 | Léopold Hounkanrin | | 51.04 | - |
| 7 | Joseph Ramotshabi | | 51.49 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | Dele Udo | | 46.48 | - |
| 2 | Joseph Coombs | | 46.55 | - |
| 3 | Rick Mitchell | | 46.63 | - |
| 4 | Jens Smedegaard Hansen | | 47.01 | - |
| 5 | Jimmy Massallay | | 49.68 | - |
| 6 | El-Mehdi Sallah Diab | | 49.89 | - |
| 7 | Panh Khemanith | | 53.74 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | Derrick Peynado | | 47.37 | - |
| 2 | Fons Brijdenbach | | 47.72 | - |
| 3 | Andrzej Stępień | | 47.99 | - |
| 4 | Glen Cohen | | 48.35 | - |
| 5 | Régis Tranquille | | 49.34 | - |
| 6 | Mohamed Diakité | | 49.59 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | Viktor Markin | | 46.88 | - |
| 2 | Mike Solomon | | 47.24 | - |
| 3 | Hope Ezeigbo | | 47.46 | - |
| 4 | Jacques Borlée | | 47.77 | - |
| 5 | Mohamed El-Abed | | 50.47 | - |
| 6 | Sahr Kendor | | 52.98 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | Jozo Alebić | | 47.61 | - |
| 2 | Stefano Malinverni | | 47.63 | - |
| 3 | Ian Stapleton | | 47.97 | - |
| 4 | Hussain Ali Nasayyif | | 48.03 | - |
| 5 | Harry Schulting | | 48.53 | - |
| 6 | William Akabi-Davis | | 50.80 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | Frank Schaffer | | 46.13 | - |
| 2 | Viktor Burakov | | 46.41 | - |
| 3 | Alberto Juantorena | | 46.69 | - |
| 4 | Roberto Tozzi | | 47.01 | - |
| 5 | Jerzy Pietrzyk | | 47.18 | - |
| 6 | Geraldo José Pegado | | 48.71 | - |
| Rank | Athlete | Nation | Time | Notes |
| 1 | Nikolay Chernetskiy | | 47.04 | - |
| 2 | Mauro Zuliani | | 47.16 | - |
| 3 | Marcel Klarenbeek | | 47.67 | - |
| 4 | Alan Bell | | 47.38 | - |
| 5 | Oddur Sigurðsson | | 47.39 | - |
| 6 | Isidoro Hornillos | | 47.45 | - |
