Blondeau is a French surname. Notable people with the surname include:
Charles Bruno Blondeau (1835–1888), Canadian politician and contractorGustav Blondeau (1871–1965), co-founder of early aircraft manufacturer Hewlett & BlondeauJean-Yves Blondeau (1970–), inventor the 32-wheel roller suitPatrick Blondeau (1968–), international footballerPeter Blondeau (1672–), French moneyer and engineerThérèse Blondeau (1913–2013), French swimmerThomas Blondeau (1978–2013), Belgian writer and journalistThylane Blondeau (2001–), French model and actress