Castellón (Catalan: Castelló) may refer to:

• Castellón de la Plana, the capital city of the province of Castellón, in Valencian Community, Spain
• Province of Castellón, a province in Valencian Community, Spain
• Castelló, formerly Castelló de la Ribera
• Castelló d'Empúries
• Castelló de Farfanya
• Castelló de Rugat

• CD Castellón, a Spanish football team
• AB Castelló, a Spanish basketball team

• Julia Castelló (born 1990), Spanish swimmer
• Núria Castelló (born 1971), Spanish swimmer
• Pedro Álvarez Castelló (1967–2004), Cuban artist
• Blanca Castellón (born 1958), Nicaraguan poet
• Jorge Castellón (born 1969), Bolivian sprinter
• José Rizo Castellón (born 1944), Nicaraguan politician
• Facundo Hurtado Castellón (born 1950), Bolivian politician and journalist
• Federico Castellón (1914–1971), American painter and illustrator
• Francisco Castellón (1815–1855), president of "Democratic" Nicaragua during the 1854–1856 civil war
• Gabriel Castellón (born 1993), Chilean footballer
• Francisco Javier Castellón (born 1960), Mexican politician
• Ninoska Pérez Castellón (born 1950), Cuban-American media personality
• Vladimir Castellón (born 1989), Bolivian footballer

• Castello (disambiguation)