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.

[1] The defending champion was Thailand.

The top two teams of each group advanced to the semi-finals.

In the knockout stage, the penalty shoot-outs are used to decide the winner if necessary (extra time is not used).