| Jirayu Niamthaisong | |
| Fullname: | Jirayu Niamthaisong |
| Birth Date: | 29 September 1996 |
| Birth Place: | Maha Sarakham, Thailand |
| Position: | Midfielder |
| Years1: | 2017–2024 |
| Caps1: | 5 |
| Goals1: | 0 |
| Years2: | 2022–2023 |
| Clubs2: | → Samut Prakan (loan) |
| Years3: | 2023–2024 |
| Clubs3: | → Ayutthaya United (loan) |
| Caps3: | 24 |
| Goals3: | 0 |
| Years4: | 2024– |
| Goals4: | 0 |
| Pcupdate: | 10 November 2020 |
Jirayu Niamthaisong (th|จิรายุ เนียมไธสง, born 29 September 1996), is a Thai professional footballer who plays as a midfielder.