| Ratchanat Arunyapairot | |
| Fullname: | Ratchanat Arunyapairot |
| Birth Date: | 22 June 1996 |
| Birth Place: | Suphan Buri, Thailand |
| Currentclub: | Sukhothai |
| Clubnumber: | 8 |
| Position: | Attacking midfielder, winger |
| Youthyears1: | 2012–2014 |
| Youthclubs1: | Ratchaburi Mitr Phol |
| Years1: | 2014–2017 |
| Clubs1: | Ratchaburi Mitr Phol |
| Caps1: | 2 |
| Goals1: | 0 |
| Years2: | 2015 |
| Clubs2: | → RBAC (loan) |
| Caps2: | 2 |
| Goals2: | 0 |
| Years3: | 2016 |
| Clubs3: | → Singburi Bangrajun (loan) |
| Caps3: | 24 |
| Goals3: | 8 |
| Years4: | 2017 |
| Clubs4: | → Chainat Hornbill (loan) |
| Caps4: | 12 |
| Goals4: | 1 |
| Years5: | 2018–2019 |
| Clubs5: | Chainat Hornbill |
| Caps5: | 24 |
| Goals5: | 2 |
| Years6: | 2020–2022 |
| Clubs6: | Suphanburi |
| Caps6: | 39 |
| Goals6: | 6 |
| Years7: | 2022–2024 |
| Clubs7: | Bangkok United |
| Caps7: | 16 |
| Goals7: | 1 |
| Years8: | 2024– |
| Clubs8: | Sukhothai |
| Caps8: | 0 |
| Goals8: | 0 |
| Nationalyears1: | 2018 |
| Nationalteam1: | Thailand U23 |
| Nationalcaps1: | 5 |
| Nationalgoals1: | 1 |
Ratchanat Arunyapairot (th|รัชนาท อรัญญไพโรจน์, born June 22, 1996) is a Thai professional footballer who plays as an attacking midfielder or a winger for Thai League 1 club Sukhothai.