Sainsbury is an English surname. Notable people with the surname include:
Alfred Sainsbury (1856–1920), Australian police chief Amanda Sainsbury-Salis (born 1969), Australian molecular scientist, educator and author Amber Sainsbury (born 1978), New Zealand actress Ben Sainsbury (born 1972), Canadian-American film director Edward Sainsbury (1851–1930), English cricketer Lionel Sainsbury (born 1958), English classical composer Mark Sainsbury (broadcaster) (born 1956), New Zealand journalist and broadcaster Mark Sainsbury (philosopher) (born 1943), British philosopher Murray Sainsbury (born 1940), Australian politician Peter Sainsbury (1934–2014), English cricketer Roger Sainsbury (bishop) (1936–2025), British Anglican bishop Roger Sainsbury (engineer) (born 1940), British engineer Tony Sainsbury, British chef de mission at multiple Paralympic Games Trent Sainsbury (born 1992), Australian footballer Sainsbury family, members founded Sainsbury's supermarket chain in the UK