Castiello may refer to:
People Francesco Castiello (1942–2024), Italian politician
Places Castiello Bernueces, a parish of the municipality of Gijón / Xixón, in Asturias, Spain Castiello de Guarga, a locality in the municipality of Sabiñánigo, in Huesca province, Aragon, Spain Castiello de Jaca, a municipality in the province of Huesca, Aragon, Spain