Blanchet is a French surname. Notable people with the surname include:
Abbé François Blanchet (1707–1784), French littérateurAugustin-Magloire Blanchet (1797–1887), first Bishop of Walla Walla and Nesqually (Washington); brother of François NorbertEmile-Robert Blanchet (1877–1943), Swiss-born, French-settled pianist and composerFrançois Blanchet (disambiguation)Georges Blanchet, Oblate missionary in British Columbia and the Pacific NorthwestJean Blanchet (watchmaker), Swiss watchmaker, founder of Manufacture d'Horologerie Blanchet & CieJoseph-Goderic Blanchet (1820–1890), Canadian physician and politicianLuz Blanchet (born 1966), Mexican TV hostPierre Blanchet, (1459–1519), l’Avocat patelin