| 2022 | |||
| (Eugene, Oregon, July 22) | |||
| 1. | Michael Norman (USA) | 44.29 | |
| 2. | Kirani James (Grenada) | 44.48 | |
| 3. | Matthew Hudson-Smith (Great Britain) | 44.66 | |
| 4. | Champion Allison (USA) | 44.77 | |
| 5. | Wayde van Niekerk (South Africa) | 44.97 | |
| 6. | Bayapo Ndori (Botswana) | 45.29 | |
| 7. | Christopher Taylor (Jamaica) | 45.30 | |
| 8. | Jonathan Jones (Barbados) | 46.13 | |
| 9. | Ayden Owens-Delerme (Puerto Rico) | 45.07 | |
| [Michael Cherry (USA) 4th in semi] | |||
| 2019 | ||||
| (Doha, Qatar, October 4) | ||||
| 1. | Steven Gardiner (Bah) | 43.48 | ||
| 2. | Anthony Zambrano (Col) | 44.15 | ||
| 3. | Fred Kerley (US) | 44.17 | ||
| 4. | Demish Gaye (Jam) | 44.46 | ||
| 5. | Kirani James (Grn) | 44.54 | ||
| 6. | Emmanuel Korir (Ken) | 44.94 | ||
| 7. | Machel Cedenio (Tri) | 45.30 | ||
| 8. | Akeem Bloomfield (Jam) | 45.36 | ||
| [Vernon Norwood (US) 4th in semi] | ||||
| [Michael Norman (US) 7th in semi] | ||||
| [Nathan Strother (US) 7th in semi] | ||||
| 2017 | ||||
| (London, August 8) | ||||
| 1 | Wayde van Niekerk (South Africa) | 43.98 | ||
| 2 | Steven Gardiner (Bahamas) | 44.41 | ||
| 3 | Abdalelah Haroun (Qatar) | 44.48 | ||
| 4 | Baboloki Thebe (Botswana) | 44.66 | ||
| 5 | Nathon Allen (Jamaica) | 44.88 | ||
| 6 | Demish Gaye (Jamaica) | 45.04 | ||
| 7 | Fred Kerley (US) | 45.23 | ||
| dnc | Isaac Makwala (Botswana) | |||
| [Gil Roberts (US) 3rd in semi | ||||
| [Wil London (US) 5th in semi] | ||||
| [LaShawn Merritt (US) 7th in semi] | ||||
| 2015 | ||||
| (Beijing, August 26) | ||||
| 1 | Wayde van Niekerk (South Africa) | 43.48 | ||
| 2 | LaShawn Merritt (US) | 43.65 | ||
| 3 | Kirani James (Grenada) | 43.78 | ||
| 4 | Luguelín Santos (Dominican Republic) | 44.11 | ||
| 5 | Isaac Makwala (Botswana) | 44.63 | ||
| 6 | Rabah Yousif (Great Britain) | 44.68 | ||
| 7 | Machel Cedenio (Trinidad) | 45.06 | ||
| 8 | Youssef Al-Masrahi (Saudi Arabia) | 45.15 | ||
| [David Verburg (US) 3rd in semi] | ||||
| [Bryshon Nellum (US) 5th in semi] | ||||
| [Vernon Norwood (US) 6th in semi] | ||||
| 2013 | ||||
| (Moscow, August 13) | ||||
| 1 | LaShawn Merritt (US) | 43.74 | ||
| 2 | Tony McQuay (US) | 44.40 | ||
| 3 | Luguelín Santos (Dominican Republic) | 44.52 | ||
| 4 | Jonathan Borlée (Belgium) | 44.54 | ||
| 5 | Pavel Maslák (Czech Republic) | 44.91 | ||
| 6 | Youssef Al-Masrahi (Saudi Arabia) | 44.97 | ||
| 7 | Kirani James (Grenada) | 44.99 | ||
| 8 | Anderson Henriques (Brazil) | 45.03 | ||
| [Arman Hall (US) 5th in heat] | ||||
| 2011 | ||||
| 1 | Kirani James (Grenada) | 44.60 | ||
| 2 | LaShawn Merritt (US) | 44.63 | ||
| 3 | Kevin Borlee (Belgium) | 44.90 | ||
| 4 | Jermaine Gonzales (Jamaica) | 44.99 | ||
| 5 | Jonathan Borlée (Belgium) | 45.07 | ||
| 6 | Rondell Bartholomew (Grenada) | 45.45 | ||
| 7 | Tabarie Henry (Virgin Islands) | 45.55 | ||
| 8 | Femi Ogunode (Qatar) | 45.55 | ||
| [Jamaal Lawrence (US) 4th in semi] | ||||
| [Greg Nixon (US) 5th in semi] | ||||
| [Tony McQuay (US) 6th in heat] | ||||
| 2009 | ||||
| 1 | LaShawn Merritt (US) | 44.06 | ||
| 2 | Jeremy Wariner (US) | 44.60 | ||
| 3 | Renny Quow (Trinidad) | 45.02 | ||
| 4 | Tabarie Henry (Virgin Islands) | 45.42 | ||
| 5 | Chris Brown (Bahamas) | 45.47 | ||
| 6 | David Gillick (Ireland) | 45.53 | ||
| 7 | Michael Bingham (Great Britain) | 45.56 | ||
| 8 | Leslie Djhone (France) | 45.90 | ||
| [Lionel Larry (US) 6th in semi] | ||||
| [Gil Roberts (US) 5th in heat] | ||||
| 2007 | ||||
| 1 | Jeremy Wariner (US) | 43.45 | ||
| 2 | LaShawn Merritt (US) | 43.96 | ||
| 3 | Angelo Taylor (US) | 44.32 | ||
| 4 | Chris Brown (Bahamas) | 44.45 | ||
| 5 | Leslie Djhone (France) | 44.59 | ||
| 6 | Tyler Christopher (Canada) | 44.71 | ||
| 7 | Johan Wissman (Sweden) | 44.72 | ||
| 8 | Avard Moncur (Bahamas) | 45.40 | ||
| [Lionel Larry (US) dnf in heat] | ||||
| 2005 | ||||
| 1 | Jeremy Wariner (US) | 43.93 | ||
| 2 | Andrew Rock (US) | 44.35 | ||
| 3 | Tyler Christopher (Canada) | 44.44 | ||
| 4 | Chris Brown (Bahamas) | 44.48 | ||
| 5 | Tim Benjamin (Great Britain) | 44.93 | ||
| 6 | Brandon Simpson (Jamaica) | 45.01 | ||
| 7 | Darold Williamson (US) | 45.12 | ||
| 8 | John Steffensen (Australia) | 45.46 | ||
| 2003 | ||||
| 1 | Tyree Washington (US) | 44.77 | ||
| 2 | Marc Raquil (France) | 44.79 | ||
| 3 | Michael Blackwood (Jamaica) | 44.80 | ||
| 4 | Leslie Djhone (France) | 44.83 | ||
| 5 | Eric Milazar (Mauritius) | 45.17 | ||
| 6 | Alleyne Francique (Grenada) | 45.48 | ||
| retroactive doping dq—[1] Jerome Young (US) [44.50] | ||||
| retroactive doping dq—[6] Calvin Harrison (US) [44.96] | ||||
| 2001 | ||||
| 1 | Avard Moncur (Bahamas) | 44.64 | ||
| 2 | Ingo Schultz (Germany) | 44.87 | ||
| 3 | Greg Haughton (Jamaica) | 44.98 | ||
| 4 | Eric Milazar (Mauritius) | 45.13 | ||
| 5 | Hamdan Al-Bishi (Saudi Arabia) | 45.23 | ||
| 6 | Alleyne Francique (Grenada) | 46.23 | ||
| dnc | Robert Mackowiak (Poland) | |||
| retroactive doping dq—[4] Antonio Pettigrew (US) [44.99] | ||||
| [Leonard Byrd (US) 4th in semi] | ||||
| [Jerome Young (US) retroactive doping dq—4th in semi] | ||||
| [Michael Johnson (US) eligible as wild card, but did not enter] | ||||
| 1999 | ||||
| 1 | Michael Johnson (US) | 43.18 | WR, WCR | |
| 2 | Sanderlei Parrela (Brazil) | 44.29 | ||
| 3 | Alejandro Cárdenas (Mexico) | 44.31 | ||
| 4 | Mark Richardson (Great Britain) | 44.65 | ||
| 5 | Greg Haughton (Jamaica) | 45.07 | ||
| 6 | Jamie Baulch (Great Britain) | 45.18 | ||
| retroactive doping dq—[4] Jerome Young (US) [44.36] | ||||
| retroactive doping dq—[5] Antonio Pettigrew (US) [44.54] | ||||
| [Jerome Davis (US) 5th in semi] | ||||
| 1997 | ||||
| 1 | Michael Johnson (US) | 44.12 | ||
| 2 | Davis Kamoga (Uganda) | 44.37 | ||
| 3 | Tyree Washington (US) | 44.39 | ||
| 4 | Mark Richardson (Great Britain) | 44.47 | ||
| 5 | Jerome Young (US) | 44.51 | ||
| 6 | Iwan Thomas (Great Britain) | 44.52 | ||
| 7 | Jamie Baulch (Great Britain) | 45.22 | ||
| retroactive doping dq—[7] Antonio Pettigrew (US) [44.57] | ||||
| 1995 | ||||
| 1 | Michael Johnson (US) | 43.39 | WCR | |
| 2 | Butch Reynolds (US) | 44.22 | ||
| 3 | Greg Haughton (Jamaica) | 44.56 | ||
| 4 | Samson Kitur (Kenya) | 44.71 | ||
| 5 | Mark Richardson (Great Britain) | 44.81 | ||
| 6 | Darnell Hall (US) | 44.83 | ||
| 7 | Roger Black (Great Britain) | 45.28 | ||
| 8 | Sunday Bada (Nigeria) | 45.50 | ||
| 1993 | ||||
| 1 | Michael Johnson (US) | 43.65 | WCR | |
| 2 | Butch Reynolds (US) | 44.13 | ||
| 3 | Samson Kitur (Kenya) | 44.54 | ||
| 4 | Quincy Watts (US) | 45.05 | ||
| 5 | Sunday Bada (Nigeria) | 45.11 | ||
| 6 | Greg Haughton (Jamaica) | 45.63 | ||
| 7 | Simon Kemboi (Kenya) | 45.65 | ||
| 8 | Kennedy Ochieng (Kenya) | 45.68 | ||
| 1991 | ||||
| 1 | Antonio Pettigrew (US) | 44.57 | ||
| 2 | Roger Black (Great Britain) | 44.62 | ||
| 3 | Danny Everett (US) | 44.63 | ||
| 4 | Roberto Hernández (Cuba) | 44.86 | ||
| 5 | Andrew Valmon (US) | 45.09 | ||
| 6 | Ian Morris (Trinidad) | 45.12 | ||
| 7 | Susumu Takano (Japan) | 45.39 | ||
| 8 | Mark Garner (Australia) | 45.47 | ||
| 1987 | ||||
| 1 | Thomas Schönlebe (East Germany) | 44.33 | ||
| 2 | Innocent Egbunike (Nigeria) | 44.56 | ||
| 3 | Butch Reynolds (US) | 44.80 | ||
| 4 | Roberto Hernández (Cuba) | 44.99 | ||
| 5 | Derek Redmond (Great Britain) | 45.06 | ||
| 6 | David Kitur (Kenya) | 45.34 | ||
| 7 | Gabriel Tiacoh (Côte d’Ivoire) | 46.27 | ||
| 8 | Roddie Haley (US) | 46.77 | ||
| [Antonio McKay (US) 5th in quarter] | ||||
| [Redmond 45.03 WCR {quarter}; Schönlebe 44.81 WCR {quarter}; Egbunike 44.26 WCR {semi}] | ||||
| 1983 | ||||
| 1 | Bert Cameron (Jamaica) | 45.05 | WCR | |
| 2 | Michael Franks (US) | 45.22 | ||
| 3 | Sunder Nix (US) | 45.24 | ||
| 4 | Erwin Skamrahl (West Germany) | 45.37 | ||
| 5 | Hartmut Weber (West Germany) | 45.49 | ||
| 6 | Thomas Schönlebe (East Germany) | 45.50 | ||
| 7 | Michael Paul (Trinidad) | 45.80 | ||
| 8 | Gérson Souza (Brazil) | 45.91 | ||
| [Eliot Tabron (US) 6th in quarter] | ||||
| [Nix 46.19 WCR {heat}; Cameron 46.11 WCR {heat}; Weber 45.74 WCR {heat}; Franks 45.57 WCR {quarter}, 45.44 WCR {semi}] | ||||