- There were 942 total athletes from 173 countries.
- Gaurik Singh was the youngest participant with 13 years and 254 days.
- Therese Alshammar was the oldest participant with 38 years and 351 days.
- 23 participants were chosen to be a flag bearer at the opening ceremony.
- United States won 33 medals, more than in any other sport.
- Australia won 10 medals, more than in any other sport.
- Hungary won 7 medals, more than in any other sport.
- Sweden won 3 medals, more than in any other sport.
- Singapore won their only medal of Rio de Janeiro 2016, and their first ever medal in Swimming.
- Michael Phelps won his 28th medal at the Olympic Games.
- 8 world records were broken, on 7 different distances.