| Cao Dayuan | |
|---|---|
| Full name | Cao Dayuan |
| Chinese | 曹大元 |
| Pinyin | Cáo Dàyuán |
| Born | (1962-01-26) January 26, 1962 Shanghai, China |
| Residence | China |
| Pupil | Xie He, Fan Tingyu |
| Turned pro | 1985 (full time) |
| Rank | 9 dan |
| Affiliation | Zhongguo Qiyuan |
Cáo Dàyuán (Chinese: 曹大元), born January 26, 1962) is a professional Go player.