Dimbleby is an English-language surname, notable bearers of which include the following:
- Richard Dimbleby (1913–1965), BBC television news commentator and war reporter
- David Dimbleby (born 1938), elder son of Richard, journalist and host of BBC Election Night coverage from 1979 to 2017
- Josceline Dimbleby (born 1943), first wife of David, former cookery correspondent for The Sunday Telegraph
- Henry Dimbleby (born 1970), son of David, businessman, cook and food writer
- Kate Dimbleby (born 1973), daughter of David, cabaret singer and songwriter
- Jonathan Dimbleby (born 1944), younger son of Richard, radio and television journalist and historian
- Bel Dimbleby aka Bel Mooney (born 1946), first wife of Jonathan, journalist and broadcaster