| Athlete |
Nation(s) |
Sport(s) |
Role(s) |
Era |
Notes |
| Becky Adlington |
 GBR |
SWM |
Olympics |
2008—2012 |
2008: Distance Freestyle Double Champion (400/800) |
| Walter Bathe |
 GER |
SWM |
Olympics |
1912 |
1912: Breaststroke Double Champion (200/400) |
| Alex Baumann |
 CAN |
SWM |
Olympics / Opening Flagbearer |
1984 |
1984: Individual Medley Double Champion (200/400) |
| Melissa Belote |
 USA |
SWM |
Olympics |
1972—1976 |
1972: Backstroke Double Champion (100/200) |
| Brooke Bennett |
USA |
SWM |
Olympics |
1996—2000 |
2000: Distance Freestyle Double Champion (400/800) |
| Matt Biondi |
USA |
SWM |
Olympics |
1984—1992 |
1988: Freestyle Sprint Double Champion (50/100) |
| Ethelda Bleibtrey |
USA |
SWM |
Olympics |
1920 |
1920: Freestyle Double Champion (100/300) |
| Inge de Bruijn |
 NED |
SWM |
Olympics / Closing Flagbearer |
1992—2004 |
2000: Freestyle Sprint Double Champion (50/100) |
| Mike Burton |
USA |
SWM |
Olympics / Closing Flagbearer |
1968—1972 |
1968: Distance Freestyle Double Champion (400/1,500) |
| Rick Carey |
USA |
SWM |
Olympics |
1984 |
1984: Backstroke Double Champion (100/200) |
| Tracy Caulkins |
USA |
SWM |
Olympics |
1984 |
1984: Individual Medley Double Champion (200/400) |
| Tiffany Cohen |
USA |
SWM |
Olympics |
1984 |
1984: Distance Freestyle Double Champion (400/800) |
| Charlie Daniels |
USA |
SWM |
Olympics / 1906 |
1904—1908 |
1904: Freestyle Double Champion (220/440) |
| Tamás Darnyi |
 HUN |
SWM |
Olympics |
1988—1992 |
1988 & 1992: Individual Medley Double-Double Champion (200/400) |
| Caeleb Dressel |
USA |
SWM |
Olympics |
2016—2024 |
2020: Freestyle Sprint Double Champion (50/100) |
| Krisztina Egerszegi |
HUN |
SWM |
Olympics |
1988—1996 |
1992: Backstroke Double Champion (100/200) |
| Kornelia Ender |
 GDR |
SWM |
Olympics |
1972—1976 |
1976: Freestyle Double Champion (100/200) |
| Janet Evans |
USA |
SWM |
Olympics / Torch Bearer |
1988—1996 |
1988: Distance Freestyle Double Champion (400/800) |
| Bobby Finke |
USA |
SWM |
Olympics |
2020—2024 |
2020: Distance Freestyle Double Champion (800/1,500) |
| Domenico Fioravanti |
 ITA |
SWM |
Olympics |
2000 |
2000: Breaststroke Double Champion (100/200) |
| Missy Franklin |
USA |
SWM |
Olympics |
2012—2016 |
2012: Backstroke Double Champion (100/200) |
| Brian Goodell |
USA |
SWM |
Olympics |
1976 |
1976: Distance Freestyle Double Champion (400/1,500) |
| Shane Gould |
 AUS |
SWM |
Olympics / Torch Bearer |
1972—2000 |
1972: Freestyle Double Champion (200/400) |
| Alfréd Hajós |
HUN |
ATT/SWM |
Olympics / Non-starter |
1896—1932 |
1896: Freestyle Double Champion (100/1,200) |
| Zoltán Halmay |
HUN |
SWM |
Olympics / 1906 |
1900—1908 |
Freestyle Sprint Double Champion (50/100) |
| Penny Heyns |
 RSA |
SWM |
Olympics |
1992—2000 |
1996: Breaststroke Double Champion (100/200) |
| Charlie Hickcox |
USA |
SWM |
Olympics |
1968 |
1968: Individual Medley Double Champion (200/400) |
| George Hodgson |
CAN |
SWM |
Olympics |
1912—1920 |
1912: Distance Freestyle Double Champion (400/1,500) |
| Pieter van den Hoogenband |
NED |
SWM |
Olympics |
1996—2008 |
2000: Freestyle Double Champion (100/200) |
| Katinka Hosszú |
HUN |
SWM |
Olympics / Closing Flagbearer |
2004—2020 |
2016: Individual Medley Double Champion (200/400) |
| John Jarvis |
GBR |
SWM/WPO |
Olympics / 1906 |
1900—1908 |
1900: Distance Freestyle Double Champion (1,000/4,000) |
| Kosuke Kitajima |
 JPN |
SWM |
Olympics / Closing Flagbearer |
2000—2012 |
2004 & 2008: Breaststroke Double Champion (100/200) |
| Yana Klochkova |
 UKR |
SWM |
Olympics / Opening Flagbearer |
2000—2008 |
2000 & 2004: Individual Medley Double-Double Champion (200/400) |
| Claudia Kolb |
USA |
SWM |
Olympics |
1964—1968 |
1968: Individual Medley Double Champion (200/400) |
| Barbara Krause |
GDR |
SWM |
Olympics |
1980 |
1980: Freestyle Double Champion (100/200) |
| Lenny Krayzelburg |
USA |
SWM |
Olympics |
2000—2004 |
2000: Backstroke Double Champion (100/200) |
| Ranomi Kromowidjojo |
NED |
SWM |
Olympics / Closing Flagbearer |
2008—2020 |
2012: Freestyle Sprint Double Champion (50/100) |
| Gunnar Larsson |
 SWE |
SWM |
Olympics |
1968—1972 |
1972: Individual Medley Double Champion (200/400) |
| Katie Ledecky |
USA |
SWM |
Olympics / Closing Flagbearer |
2012—2024 |
2016: Freestyle Triple Champion (200/400/800) / 2020 & 2024: Distance Freestyle Double-Double Champion (800/1,500) |
| Danyon Loader |
 NZL |
SWM |
Olympics |
1992—1996 |
1996: Freestyle Double Champion (200/400) |
| Helene Madison |
USA |
SWM |
Olympics |
1932 |
1932: Freestyle Double Champion (100/400) |
| Håkan Malmrot |
SWE |
SWM |
Olympics |
1920 |
1920: Breaststroke Double Champion (200/400) |
| Léon Marchand |
 FRA |
SWM |
Olympics |
2020—2024 |
2024: Individual Medley Double Champion (200/400) |
| Rie Mastenbroek |
NED |
SWM |
Olympics |
1936 |
1936: Freestyle Double Champion (100/400) |
| Roland Matthes |
GDR |
SWM |
Olympics |
1968—1976 |
1968 & 1972: Backstroke Double-Double Champion (100/200) |
| Summer McIntosh |
CAN |
SWM |
Olympics / Closing Flagbearer |
2020—2024 |
2024: Individual Medley Double Champion (200/400) |
| Emma McKeon |
AUS |
SWM |
Olympics / YOG |
2010—2024 |
2020: Freestyle Sprint Double Champion (50/100) |
| Kaylee McKeown |
AUS |
SWM |
Olympics / YOG / Closing Flagbearer |
2018—2024 |
2020 & 2024: Backstroke Double-Double Champion (100/200) |
| Mary T. Meagher |
USA |
SWM |
Olympics / Olympic Flagbearer |
1984—1996 |
1984: Butterfly Double Champion (100/200) |
| Debbie Meyer |
USA |
SWM |
Olympics |
1968 |
1968: Freestyle Triple Champion (200/400/800) |
| Diana Mocanu |
 ROU |
SWM |
Olympics |
2000 |
2000: Backstroke Double Champion (100/200) |
| Ryan Murphy |
USA |
SWM |
Olympics |
2016—2024 |
2016: Backstroke Double Champion (100/200) |
| John Naber |
USA |
SWM |
Olympics / Olympic Flagbearer |
1976—1984 |
1976: Backstroke Double Champion (100/200) |
| Yui Ohashi |
JPN |
SWM |
Olympics |
2020—2024 |
2020: Individual Medley Double Champion (200/400) |
| Kristin Otto |
GDR |
SWM |
Olympics |
1988 |
1988: Freestyle Sprint Double Champion (50/100) |
| Denis Pankratov |
 RUS
 EUN |
SWM |
Olympics |
1992—2000 |
1996: Butterfly Double Champion (100/200) |
| Aaron Peirsol |
USA |
SWM |
Olympics |
2000—2008 |
2004: Backstroke Double Champion (100/200) |
| Michael Phelps |
USA |
SWM |
Olympics / Opening Flagbearer |
2000—2016 |
2004 & 2008: Butterfly Double-Double Champion (100/200) & Individual Medley Double-Double Champion (200/400) |
| Aleksandr Popov |
RUS
EUN |
SWM |
Olympics / Administrator / Opening Flagbearer |
1992—2016 |
1992 & 1996: Freestyle Sprint Double-Double Champion (50/100) |
| Emil Rausch |
GER |
SWM |
Olympics / 1906 |
1904—1906 |
1904: Distance Freestyle Double Champion (880/Mile) |
| Rica Reinisch |
GDR |
SWM |
Olympics |
1980 |
1980: Backstroke Double Champion (100/200) |
| Steph Rice |
AUS |
SWM |
Olympics / Closing Flagbearer |
2008—2012 |
2008: Individual Medley Double Champion (200/400) |
| Ulrike Richter |
GDR |
SWM |
Olympics |
1976 |
1976: Backstroke Double Champion (100/200) |
| Murray Rose |
AUS |
SWM |
Olympics / Olympic Flagbearer |
1956—2000 |
1956: Distance Freestyle Double Champion (400/1,500) |
| Norman Ross |
USA |
SWM/WPO |
Olympics |
1920 |
1920: Distance Freestyle Double Champion (400/1,500) |
| Yevgeny Rylov |
 ROC
RUS |
SWM |
Olympics / YOG |
2014—2020 |
2020: Backstroke Double Champion (100/200) |
| Yevgeny Sadovy |
RUS
EUN |
SWM |
Olympics |
1992 |
1992: Freestyle Double Champion (200/400) |
| Vladimir Salnikov |
RUS
 URS |
SWM |
Olympics |
1976—1988 |
1980: Distance Freestyle Double Champion (400/1,500) |
| Don Schollander |
USA |
SWM |
Olympics / Closing Flagbearer |
1964—1968 |
1964: Freestyle Double Champion (100/400) |
| Sarah Sjöström |
SWE |
SWM |
Olympics |
2008—2024 |
2024: Freestyle Sprint Double Champion (50/100) |
| Michelle Smith |
 IRL |
SWM |
Olympics / Opening Flagbearer |
1988—1996 |
1996: Individual Medley Double Champion (200/400) |
| Mark Spitz |
USA |
SWM |
Olympics |
1968—1972 |
1972: Freestyle Double Champion (100/200) & Butterfly Double Champion (100/200) |
| Britta Steffen |
GER |
SWM |
Olympics |
2000—2012 |
2008: Freestyle Sprint Double Champion (50/100) |
| Sun Yang |
 CHN |
SWM |
Olympics |
2008—2016 |
2012: Distance Freestyle Double Champion (400/1,500) |
| Henry Taylor |
GBR |
SWM |
Olympics / 1906 |
1906—1920 |
1908: Distance Freestyle Double Champion (400/1,500) |
| Ian Thorpe |
AUS |
SWM |
Olympics / Closing Flagbearer |
2000—2004 |
2004: Freestyle Double Champion (200/400) |
| Petra Thümer |
GDR |
SWM |
Olympics |
1976 |
1976: Distance Freestyle Double Champion (400/800) |
| Ariarne Titmus |
AUS |
SWM |
Olympics |
2020—2024 |
2020: Freestyle Double Champion (200/400) |
| Amy Van Dyken |
USA |
SWM |
Olympics |
1996—2000 |
1996: Freestyle Sprint Double Champion (50/100) |
| Johnny Weissmuller |
USA |
SWM/WPO |
Olympics |
1924—1928 |
1924: Freestyle Double Champion (100/400) |
| Mike Wenden |
AUS |
SWM |
Olympics / Olympic Flagbearer / Closing Flagbearer |
1968—2000 |
1968: Freestyle Double Champion (100/200) |
| Ye Shiwen |
CHN |
SWM |
Olympics |
2012—2024 |
2012: Individual Medley Double Champion (200/400) |
