| Mike Day | |
| Fullname: | Mike Day |
| Nickname: | Wino |
| Birth Date: | 31 July 1955 |
| Birth Place: | Auckland, New Zealand |
| Hometown: | Auckland, New Zealand |
| Since: | 1981 |
| Darts: | 23 Gram Shot |
| Laterality: | Right-handed |
| Bdo: | 2009–2020 |
| Wdf: | 2009– |
| Currentrank: | (WDF) |
| Bdo World: | Last 32: 2014 |
| World Darts Trophy: | Last 32: 2014 |
| Tournament: | Canterbury Open |
| Resultyears: | 2013 |
Mike Day (born 31 July 1955 in Auckland) is a New Zealand professional darts player who currently plays in World Darts Federation events. He reached the first round of the 2014 BDO World Darts Championship.
In 2013 he won the Canterbury Open, he beat Tony Carmichael in the final 5–4. He qualified for the 2014 BDO World Darts Championship, he played Sam Head in the preliminary round winning 3–0 before losing to Glen Durrant in the first round 3–0. He qualified for the 2015 BDO World Darts Championship, he played Jeff Smith in the preliminary round losing 3–0.