Byatt is a surname. Notable people with the surname include:
A. S. Byatt (1936–2023), English novelist, poet and Booker Prize winner Andy Byatt, English wildlife documentary film producer for the BBC Natural History Unit (NHU) in Bristol Anthony Byatt (1928–2014), English writer Dennis Byatt (born 1958), English footballer Horace Byatt (1875–1933), British colonial governor Ian Byatt (born 1932), British economist, first director general of Ofwat Robin Byatt (1930–2019), British diplomat Sharon Byatt, British based actress born in Liverpool, who played Irenee in Carla Lane's Bread
See also 22724 Byatt (provisional designation: 1998 SE59), an outer main-belt minor planet