Hannah Baker is a fictional character created by American author Jay Asher. She is the subject of his 2007 young adult fiction mystery novel "Thirteen Reasons Why", which was adapted by the media company Netflix as "13 Reasons Why". Hannah is introduced as a sophomore at the fictional Liberty High School, where she struggles to adjust to living in an unsympathetic school environment. She later on ends up killing herself.

In the television series, Baker is portrayed by Australian actress and model Katherine Langford.

Though the first season of "13 Reasons Why" received highly positive reviews, the show's later seasons reception became increasingly divisive among critics and audiences. While critics were split on several aspects of the show, in particular how it handled mental health and its depictions of rape and suicide, Langford's performance was highly praised. Langford later received a Golden Globe Award nomination for her performance.

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