Boulnois is a French surname which may refer to:
Alfred Boulnois, French cyclist who competed in the 1900 Summer Olympics Edmund Boulnois (1838–1911), British businessman and politician Joseph Boulnois (1884–1918), French composer and organist Michel Boulnois (1907–2008), French composer and organist Luce Boulnois (1931–2009), French historian