Gatty is a surname. Notable people with the surname include:
Alfred Gatty (1813–1903), British Church of England vicar and authorAlfred Scott-Gatty (1847–1918), British officer of arms and composerHarold Gatty (1903–1957), Australian navigator, inventor, and aviation pioneerHarsha Raj Gatty (born 1987), Indian activistJuliana Horatia Ewing (née Gatty) (1841–1885), English writer of children's storiesLuis Gatty Ribeiro (born 1979), Bolivian footballerMarek Gatty-Kostyal (1886–1965), Polish chemist and pharmaceutical scientistMargaret Gatty (1809–1873), English writer of children's literature and naturalistNicholas Gatty (1874–1946), English composer and music critic