Rungrath Poomchantuek (, born 5 January 1992), is a Thai professional footballer who plays as a winger for Thai League 1 club Bangkok United and the Thailand national team.
In March 2015 Rungrath made his debut for Thailand in a friendly match against Singapore. Rungrath won the 2015 Southeast Asian Games with Thailand U23.
In January 2024, he was named in the 26-man squad for the 2023 AFC Asian Cup in Qatar.