de Vilallonga is a surname. Notable people with the surname include:
Jesús Carles de Vilallonga (1927-2018), Catalan painter and sculptor José Luis de Vilallonga (1920–2007), Spanish actor and writer Rafaela Ybarra de Vilallonga (1843–1900), Beatified Spanish Catholic
See also Martín Vilallonga Villalonga (disambiguation)