Olympian Database
Athletics World Championship | |||||
World Champions 400 m M |
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| Budapest 2023 |  | JAM | Antonio Watson | |
| Eugene 2022 |  | USA | Michael Norman | |
| Doha 2019 |  | BAH | Steven Gardiner | |
| London 2017 |  | RSA | Wayde van Niekerk | |
| Beijing 2015 | | RSA | Wayde van Niekerk | |
| Moscow 2013 | | USA | LaShawn Merritt | |
| Daegu 2011 |  | GRN | Kirani James | |
| Berlin 2009 | | USA | LaShawn Merritt | |
| Osaka 2007 | | USA | Jeremy Wariner | |
| Helsinki 2005 | | USA | Jeremy Wariner | |
| Paris 2003 | | USA | Tyree Washington | |
| Edmonton 2001 | | BAH | Avard Moncur | |
| Sevilla 1999 | | USA | Michael Johnson | |
| Athens 1997 | | USA | Michael Johnson | |
| Göteborg 1995 | | USA | Michael Johnson | |
| Stuttgart 1993 | | USA | Michael Johnson | |
| Tokyo 1991 | | USA | Antonio Pettigrew | |
| Rome 1987 |  | GDR | Thomas Schönlebe | |
| Helsinki 1983 | | JAM | Bert Cameron | |
