Hatt is an Old English surname, the name was held by the Anglo-Saxons since before the Saxon invasion and is historically the oldest English surname recorded.^[1] Notable people with the surname include:

• Richard Hatt, businessman, judge and political figure in Upper Canada
• Emilie Demant Hatt (1873–1958), Danish artist
• Gudmund Hatt (1884–1960), Danish archaeologist
• Eliza Ruth Hatt (died 1892), mistress of William Henry Crossland and mother of his illegitimate son
• John Hatt, travel editor of Harper's and Queen, founder in 1982 of Eland Books
• Robert T. Hatt, naturalist and author, discoverer of Hatt's vesper rat
• Rona Hatt, Canada's first female chemical engineer.

• Sir Topham Hatt, the Fat Controller of Thomas the Tank Engine

This page lists people with the surname Hatt.
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