Which La Liga clubs have never been relegated?

Real Madrid was one of the founding members of the Royal Spanish Football Federation, an organization that was formed on January 4, 1909.

Together with other founding clubs FC Barcelona and Athletic Bilbao, they are one of the three clubs that have never been relegated from the first division of Spanish football.

That’s very much to the contrary as famous football club Manchester United in England, who were relegated numerous times before their rise to prominence in the 1950s.