Hatt may refer to:
Hatt, Cornwall- Cornwall coord|50.42|N|04.26|W|region:GB SX3961
Richard Hatt, a businessman, judge and political figure in Upper Canada
* The Hatt family, fictional characters including
The Fat Controller, the head of the railway in The Railway Series of books written by Rev. W. V. Awdry
* High All The Time
* An acronym meaning Help Authoring Tools and Techniques. See
Help authoring tool.
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