Ernesto Amantegui Phumipha (Thai: เอร์เนสโต อมันเตกี ภูมิภา; born 16 April 1990) is a footballer who plays for Thai club Bangkok United F.C. as a left back.
Born in Oviedo, Asturias, to a Spanish father and a Thai mother, Amantegui played youth football with local Real Oviedo, making his debut with the first team on 17 May 2009 in a Tercera División match against CD Condal but spending the vast majority of his two-year spell with the reserves. He continued competing in the third level in the following years, with CD Mirandés and Sporting de Gijón B, contributing with 1,105 minutes of action as the former club promoted to Segunda División for the first time in its history.
Amantegui signed for Thai Premier League side Buriram United F.C. on 23 June 2013, moving to fellow league team Army United F.C. for the 2014 campaign.