World Mahjong Organization
| Abbreviation | WMO |
|---|---|
| Formation | 30 October 2005 |
| Type | Nonprofit Organization |
| Legal status | Organization |
| Purpose | strengthen communication and exchanges; promote the Olympic spirit; promote healthy, scientific and friendly Mahjong culture; improve international mahjong competition rules |
| Headquarters | Haidian District, Beijing, China |
| Membership | 12 national organizations |
Official language | Chinese English Japanese |
President | Guangyuan Yu |
| Affiliations | European Mahjong Association |
| Website | World Mahjong Network |
The World Mahjong Organization (Chinese: 世界麻将组织) is the international governing body of mahjong in its variation called MCR (Mahjong Competition Rules, Chinese: 麻将竞赛规则), also known as Chinese official rules. Its headquarters is located in Beijing, China. As of 2015, its president is Jiang Xueqi.