Guillebaud is a surname. Notable people with the surname include:
Claude Guillebaud (1890–1971), British economist and public servant Jean-Claude Guillebaud (1944–2025), French writer, essayist, lecturer and journalist John Guillebaud, British medical doctor Walter Guillebaud (1890–1973), British civil servant and forester, twin brother of Claude
See also Guillebaud Report, see Enquiry into the Cost of the National Health Service Chris Guillebeau (born 1978), American author, entrepreneur, blogger, and speaker