- Who
- Hongkou Township People's Government of Dujiangyan (China)
- What
- 2380 people
- Where
- China (Chengdu/Dujiangyan/Hongkou)
- When
The most people playing mahjong simultaneously is 2,380 participants and was achieved by Hongkou Township People's Government of Dujiangyan (China) in Dujiangyan, Sichuan, China, on 19 September 2013.