Most countries participating at a Summer Olympic Games
- 記録保持者
- Rio de Janeiro
- 内容
- 207 total number
- 場所
- Brazil (Rio de Janeiro)
- 達成日
- August 2016
A total of 207 National Olympic Committees (NOCs) were represented at the 2016 Summer Olympics held in Rio de Janeiro, Brazil.
Rio Olympic Games is also the record holder of most participants at a Summer Olympic Games and most medals awarded at one Olympic Games.