The 2018 AFF U-16 Girls' Championship was the 3rd edition of the AFF U-16 Girl's Championship, an international women's football tournament organised by the ASEAN Football Federation (AFF). The tournament was hosted by Indonesia from 1 to 13 May 2018. The defending champion was Thailand. They managed to retain their title.
The top two teams of each group advanced to the semi-finals. All times listed are Indonesia Western Standard Time ()
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In the knockout stage, the penalty shoot-outs are used to decide the winner if necessary (extra time is not used).