Supachai Komsilp (; born February 18, 1980) is a Thai professional football manager and former player. He is currently the head coach of Thai League 2 club Bangkok.
Supachai was called up to the national team, in coach Winfried Schäfer first squad selection for the 2014 FIFA World Cup qualification.
On 15 December 2025, Supachai was announced as the new head coach of Bangkok in Thai League 2. On 20 December 2025, Supachai won his first game in charge of Bangkok, with a 1-0 home victory over Songkla in the Thai League 2.