How many Catholics are in Spain?

In Spain, 93 per cent of people have been baptised Catholic, but only 22 per cent regard religion as important. Between 24 and 31 per cent claim to attend mass weekly, although evidence elsewhere suggests that this statistic is always overstated.

A study by the Spanish Centre of Sociological Research in February 2013 reported that about 70.5% of Spaniards self-identify as Catholics, 3.1% other faith, and about 24.1% identify with no religion. Another study in 2005 reported that 59% of the population believe there is God.

By October 2014, when the total population was 46.77 million, the proportions had changed: 67.8% of Spaniards self-identifying as Catholics, 2.3% other faith and 27.5% non-religious. There were therefore approximately 31.7 million people who identified as Catholic.

A low in-practice adherence to Catholicism is demonstrated by Spain's extremely low birthrate, given that the Catholic Church is opposed to Birth Control.