Club Deportivo Castellón SAD, commonly known as CD Castellón, is a professional football club based in Castellón de la Plana in the Valencian Community of Spain. Founded on 20 July 1922, the club has more than a century of footballing history and is deeply connected with the city and province of Castellón. The club is traditionally known by the nickname “Orelluts” and is identified by its distinctive black-and-white colours. CD Castellón plays its home matches at Castalia, a historic football stadium that has been closely associated with the club for generations. The organisation operates as a Sociedad Anónima Deportiva and combines professional sporting activities with commercial, community and player-development functions. Its sporting structure includes the senior men's first team, women's football, reserve and youth teams, together creating a pathway for players from grassroots and academy football toward professional competition. Youth development has become an increasingly important component of the club's long-term sporting strategy. The club's Ciudad Deportiva La Coma serves as an important training and development centre, supporting the development of its academy and younger teams. In the 2026–27 season, CD Castellón further expanded its development structure by introducing a second reserve team, CD Castellón C, providing an additional competitive pathway for emerging players. Beyond football, CD Castellón maintains strong links with the local community and business environment. The club works with regional and national commercial partners and uses football as a platform for community engagement, networking and social initiatives. Its identity is strongly connected to Castellón, with local companies, supporters and institutions playing an important role in the club's ecosystem. CD Castellón has competed at various levels of Spanish football throughout its history and has experienced periods in both the top flight and lower professional divisions. In recent years, the club has established itself in professional Spanish football and continues to pursue sporting growth and organisational development. With its century-long history, professional status, academy structure, women's football, reserve teams, commercial partnerships and strong regional identity, CD Castellón remains one of the significant football institutions in the Valencian Community.