Blondeau is a French surname. Notable people with the surname include:
Charles Bruno Blondeau (1835–1888), Canadian politician and contractor
Gustav Blondeau (1871–1965), co-founder of early aircraft manufacturer Hewlett & Blondeau
Jean-Yves Blondeau (1970–), inventor the 32-wheel roller suit
Patrick Blondeau (1968–), international footballer
Peter Blondeau (1672–), French moneyer and engineer
Thérèse Blondeau (1913–2013), French swimmer
Thomas Blondeau (1978–2013), Belgian writer and journalist
Thylane Blondeau (2001–), French model and actress
