| Wattanasap Jarernsri | |
| Fullname: | Wattanasap Jarernsri |
| Birth Date: | 1989 1, df=y |
| Birth Place: | Loei, Thailand |
| Height: | 1.70 m[1] |
| Position: | Midfielder |
| Youthyears1: | 2008 |
| Youthclubs1: | Chula United |
| Years1: | 2009–2014 |
| Clubs1: | BBCU |
| Caps1: | 107 |
| Goals1: | 5 |
| Years2: | 2015–2016 |
| Caps2: | 14 |
| Goals2: | 1 |
| Years3: | 2017 |
| Caps3: | 19 |
| Goals3: | 0 |
| Years4: | 2018–2019 |
| Caps4: | 13 |
| Goals4: | 0 |
| Years5: | 2019 |
| Clubs5: | →Thai Honda (loan) |
| Caps5: | 1 |
| Goals5: | 0 |
| Years6: | 2020–2021 |
| Caps6: | 16 |
| Goals6: | 2 |
| Years7: | 2021– |
| Caps7: | 0 |
| Goals7: | 0 |
| Nationalyears1: | 2008–2009 |
| Nationalteam1: | Thailand U19 |
| Pcupdate: | 22 June 2008 |
Wattanasap Jarernsri (Thai: วัฒนศัพท์ เจริญศรี, born January 1, 1989), is a Thai professional footballer who plays as a midfielder.