Club de Voleibol l'Illa-Grau
Villarreal CF has sponsored the 'Club de Voleibol L'illa Grau de Castelló' (volleyball club) since 10th September 2008. It should be noted that L'illa Grau is the best volleyball club in the province. Since its foundation, L'illa Grau has grown on both a sporting scale as well as in its number of members, which has seen the club become a leader in Spanish volleyball, both at a senior level and in the youth teams. The men's first team has been promtoed to the 'Superliga'.