Host cities:
| Athlete | Nation(s) | Sport(s) | Role(s) | Era | Notes |
|---|---|---|---|---|---|
| Zhang Yuhan |  CHN |
SWM | Olympics | 2016 | 1–0–0 2018 Hangzhou gold: 4×200 m freestyle relay |
| Zhao Jin | CHN |
SWM | Olympics | 2012 | 2–0–1 2008 Manchester gold: 4×100 m medley relay; 2010 Dubai gold: 4×100 m medley relay, bronze: 50 m breaststroke |
| Zhao Jing | CHN |
SWM | Olympics | 2008—2012 | 4–1–1 2008 Manchester gold: 4×100 m medley relay; 2010 Dubai gold: 50 m backstroke and 4×100 m medley relay, silver: 100 m backstroke; 2012 İstanbul gold: 50 m backstroke, bronze: 100 m medley |
| Zhou Yafei | CHN |
SWM | Olympics | 2004—2008 | 0–0–1 2006 Shanghai bronze: 4×100 m medley relay |
| Zhu Menghui | CHN |
SWM | Olympics | 2016—2020 | 0–1–1 2018 Hangzhou silver: 4×100 m medley relay bronze: 4×100 m freestyle relay |
| Zhu Qianwei | CHN |
SWM | Olympics | 2008—2012 | 1–0–1 2010 Dubai gold: 4×200 m freestyle relay, bronze: 4×100 m freestyle relay |
| Zhu Yi | CHN |
SWM | Olympics | 2000 | 0–1–0 2000 Athina silver: 100 m breaststroke |
| Zhu Yingwen | CHN |
SWM | Olympics | 2004—2008 | 1–0–2 2002 Moskva gold: 4×200 m freestyle relay, bronze: 4×100 m freestyle relay and 4×100 metre medley relay (swam in heats only) |
| Kate Ziegler |  USA |
SWM | Olympics | 2008—2012 | 1–2–2 2004 Indianapolis silver: 800 m freestyle; 2006 Shanghai gold: 400 m freestyle, silver: 800 m freestyle, bronze: 4×200 m freestyle relay; 2010 Dubai bronze: 800 m freestyle |
| Mark van der Zijden |  NED |
SWM | Olympics | 1996—2000 | 1–0–0 1999 Hong Kong gold: 4×200 m freestyle relay (swam in heats only) |
| Kateryna Zubkova |  UKR |
SWM | Olympics | 2004—2008 | 0–1–1 2008 Manchester silver: 100 m backstroke, bronze: 50 m backstroke |
| Martijn Zuijdweg | NED |
SWM | Olympics | 2000 | 1–0–0 1999 Hong Kong gold: 4×200 m freestyle relay |
