| Yu Cheng-yu | |
| Birth Date: | 1995 4, df=yes |
| Birth Place: | Taipei, Taiwan |
| Height: | 1.88m (06.17feet) |
| Plays: | Right-handed (two-handed backhand) |
| Careerprizemoney: | $29,062 |
| Singlesrecord: | 0–2 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Singlestitles: | 0 |
| Highestsinglesranking: | No. 531 (14 August 2017) |
| Currentsinglesranking: | No. 592 (11 September 2017) |
| Doublesrecord: | 0–0 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Doublestitles: | 0 |
| Highestdoublesranking: | No. 671 (17 April 2017) |
| Currentdoublesranking: | No. 991 (11 September 2017) |
| Updated: | 16 September 2017 |
Yu Cheng-yu (; ; born 2 April 1995) is a Taiwanese tennis player.
Yu has a career high ATP singles ranking of 531 achieved on 14 August 2017. He also has a career high ATP doubles ranking of 671 achieved on 17 April 2017.
Yu represents Chinese Taipei at the Davis Cup, where he has a W/L record of 0–1.