| Yoon Sung-yeul | |
| Birth Date: | 22 December 1987 |
| Birth Place: | South Korea |
| Height: | 1.81 m |
| Position: | Midfielder, Wing-back |
| Currentclub: | Seoul E-Land |
| Clubnumber: | 21 |
| Youthyears1: | 2006–2009 |
| Youthclubs1: | Pai Chai University |
| Years1: | 2011 |
| Clubs1: | Machida Zelvia |
| Caps1: | 14 |
| Goals1: | 0 |
| Years2: | 2012–2014 |
| Clubs2: | Matsumoto Yamaga |
| Caps2: | 55 |
| Goals2: | 0 |
| Years3: | 2015– |
| Clubs3: | Seoul E-Land |
| Caps3: | 54 |
| Goals3: | 1 |
| Years4: | 2016–2017 |
| Clubs4: | → Cheongju City (loan) |
| Caps4: | 15 |
| Goals4: | 2 |
| Years5: | 2017–2018 |
| Clubs5: | → Gimpo Citizen (loan) |
| Club-Update: | 1 February 2019 |
| Hangul: | 윤성열 |
| Hanja: | 尹誠悅 |
| Rr: | Yun Seongyeol |
| Mr: | Yun Sŏngyŏl |
Yoon Sung-yeul (born December 22, 1987) is a South Korean football player who plays for Seoul E-Land.
| Club performance | League | Cup | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Season | Club | League | Apps | Goals | Apps | Goals | Apps | Goals | |
| Japan | League | Emperor's Cup | Total | ||||||
| 2011 | Machida Zelvia | Football League | 14 | 0 | 0 | 0 | 14 | 0 | |
| 2012 | Matsumoto Yamaga | J2 League | 23 | 0 | 23 | 0 | |||
| 2013 | 17 | 0 | 1 | 0 | 18 | 0 | |||
| 2014 | 15 | 0 | 1 | 0 | 16 | 0 | |||
| Country | Japan | 69 | 0 | 2 | 0 | 71 | 0 | ||
| Total | 69 | 0 | 2 | 0 | 71 | 0 | |||