| Piyarat Lajungreed | |
| Fullname: | Piyarat Lajungreed |
| Birth Date: | 1991 9, df=y |
| Birth Place: | Nakhon Ratchasima, Thailand |
| Currentclub: | Sukhothai |
| Clubnumber: | 13 |
| Position: | Left back |
| Years1: | 2011 |
| Clubs1: | Buriram |
| Caps1: | 28 |
| Goals1: | 1 |
| Years2: | 2012 |
| Clubs2: | Buriram United |
| Caps2: | 7 |
| Goals2: | 0 |
| Years3: | 2013 |
| Clubs3: | Pattaya United |
| Caps3: | 24 |
| Goals3: | 0 |
| Years4: | 2014–2015 |
| Clubs4: | Suphanburi |
| Caps4: | 31 |
| Goals4: | 0 |
| Years5: | 2015 |
| Clubs5: | → Bangkok United (loan) |
| Caps5: | 2 |
| Goals5: | 0 |
| Years6: | 2016–2024 |
| Clubs6: | Sukhothai |
| Caps6: | 193 |
| Goals6: | 3 |
| Nationalyears1: | 2009–2010 |
| Nationalteam1: | Thailand U19 |
| Club-Update: | 12:56, 14 March 2023 (UTC) |
Piyarat Lajungreed (Thai: ปิยะราษฎร์ ลาจังหรีด, born September 18, 1991), simply known as Sun (Thai: ซัน) is a Thai professional footballer who plays as a left back for Thai League T1 club Sukhothai.