| Siwarut Pholhirun | |
| Fullname: | Siwarut Pholhirun |
| Birth Date: | 1996 9, df=yes |
| Height: | [1] |
| Birth Place: | Nakhon Si Thammarat, Thailand |
| Currentclub: | Nakhon Si United |
| Clubnumber: | 9 |
| Position: | Winger |
| Youthyears1: | 2012–2014 |
| Years1: | 2015–2019 |
| Caps1: | 26 |
| Goals1: | 1 |
| Years2: | 2015 |
| Clubs2: | → RBAC (loan) |
| Caps2: | 12 |
| Goals2: | 2 |
| Years3: | 2017 |
| Clubs3: | → Bangkok United (loan) |
| Caps3: | 6 |
| Goals3: | 0 |
| Years4: | 2018 |
| Clubs4: | → Buriram United (loan) |
| Caps4: | 1 |
| Goals4: | 0 |
| Years5: | 2019 |
| Clubs5: | → Sisaket (loan) |
| Caps5: | 12 |
| Goals5: | 0 |
| Years6: | 2019 |
| Clubs6: | → Sukhothai (loan) |
| Caps6: | 7 |
| Goals6: | 0 |
| Years7: | 2020 |
| Caps7: | 1 |
| Goals7: | 0 |
| Years8: | 2021 |
| Clubs8: | Nongbua Pitchaya |
| Caps8: | 12 |
| Goals8: | 0 |
| Years9: | 2021– |
| Clubs9: | Nakhon Si United |
| Caps9: | 15 |
| Goals9: | 2 |
| Pcupdate: | 30 April 2022 |
Siwarut Pholhirun (Thai: ศิวรุต ผลหิรัญ, born September 23, 1996), is a Thai professional footballer who plays as a winger for Thai League 2 club Nakhon Si United.