What is the main practiced religion in Spain?

Spain, officially the Kingdom of Spain is a country in southwestern Europe with some pockets of territory in the Mediterranean Sea, offshore in the Atlantic Ocean and across the Strait of Gibraltar.

Roman Catholicism, which has a long history in Spain, remains the dominant religion. Although it no longer has official status by law, in all public schools in Spain students have to choose either a religion or ethics class. Catholicism is the religion most commonly taught, although the teaching of Islam, Judaism, and evangelical Christianity is also recognised in law.

According to a 2020 study by the Spanish Centre for Sociological Research, about 61% of Spaniards self-identify as Catholics, 3% other faiths, and about 35% identify with no religion. Most Spaniards do not participate regularly in religious services.