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Why some Americans Have Left Protestantism, While Others Stay or Join

Belief in teachings and positive childhood religious experiences are key to retention, while 35% of Americans have left their childhood religion, Pew finds.

  • On Dec. 15, 2025, Pew Research Center released an analysis based on a May 5–11, 2025 American Trends Panel survey of nearly 8,900 U.S. adults and the 2023–24 Religious Landscape Study, showing most Americans were raised in a religion and about 35% have left their childhood faith.
  • Pew found belief in a religion's teachings and childhood religious experiences strongly influence retention, with 85% of people who change religion doing so before age 30.
  • Among Catholics, 46% of former adherents said they stopped believing in the church's teachings, while former Catholics who are now Protestant most often cited belief and fewer former Catholics who are now religiously unaffiliated reported weekly Mass attendance in childhood.
  • Republican identifiers are more likely to keep their childhood faith, with retention rates varying by religion—Hindus 82%, Muslims 77%, Jews 76%, Protestants 70%, and Catholics 57%—and age and political affiliation also correlate with these patterns.
  • Only a minority of parents say children take part in at least four religious activities, with 27% reporting this, while religious 'nones' raised without a religion rarely adopt one later, at just 3% of U.S. adults.
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Bias Distribution

  • 40% of the sources lean Left, 40% of the sources are Center
40% Center

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Pew Research Center broke the news in on Monday, December 15, 2025.
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