Castellvi or Castellví may refer to:
People Francesc de Castellví i de Vic (–1506), Spanish co-author of Scachs d'amor Josefina Castellví (1935–2026), Spanish oceanographer José María Castellví (1900–1944), Catalan film director Manuel de Castellví (1886–1950), Spanish footballer Vilmarie Castellvi (born 1981), Puerto Rican tennis player
Places Castellví de Rosanes, municipality in the comarca of the Baix Llobregat Castellví de la Marca, municipality in the comarca of Alt Penedès Castellvi Peak, peak on Hurd Peninsula, Livingston Island