The source asked the question in the following way: "How do you define yourself in religious matters: Catholic, believer in another religion, non-believer or atheist?"
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Distribution of the Spanish population 2025, by religious beliefs
According to a survey conducted in Spain in December 2025, **** percent of respondents stated they considered themselves lapsed Catholic. The second-largest denomination was practicing Catholics, with nearly ** percent of respondents.
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Centro de Investigaciones Sociológicas. (December 1, 2025). Distribution of the Spanish population as of December 2025, by religious beliefs [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 29, 2026, from /statistics/992648/distribution-of-the-population-by-religious-beliefs-spain/
Centro de Investigaciones Sociológicas. "Distribution of the Spanish population as of December 2025, by religious beliefs ." Chart. December 1, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 29, 2026. /statistics/992648/distribution-of-the-population-by-religious-beliefs-spain/
Centro de Investigaciones Sociológicas. (2025). Distribution of the Spanish population as of December 2025, by religious beliefs . ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 29, 2026. /statistics/992648/distribution-of-the-population-by-religious-beliefs-spain/
Centro de Investigaciones Sociológicas. "Distribution of The Spanish Population as of December 2025, by Religious Beliefs ." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 1 Dec 2025, /statistics/992648/distribution-of-the-population-by-religious-beliefs-spain/
Centro de Investigaciones Sociológicas, Distribution of the Spanish population as of December 2025, by religious beliefs ÌÇÐÄÆƽâ°æ, /statistics/992648/distribution-of-the-population-by-religious-beliefs-spain/ (last visited July 29, 2026)
Distribution of the Spanish population as of December 2025, by religious beliefs [Graph], Centro de Investigaciones Sociológicas, December 1, 2025. [Online]. Available: /statistics/992648/distribution-of-the-population-by-religious-beliefs-spain/
