- Feb 5, 2002
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Recent polling data has found that Americans’ religious affiliations have not greatly changed since 2020, appearing to stabilize following decades of substantial shifts.
Data collected by the polling firm Gallup surveyed 12,000 adults in the U.S. and found that from 2000 to 2020, the percentage of people with no religious affiliation spiked, while Protestant and Catholic populations declined.
In 2000, 57% of Americans identified as Protestant or nondenominational Christians. Over the following 20 years this group dropped more than 10 points to 46%. The Catholic population experienced a smaller yet still notable decline over the same time period, decreasing from 25% to 22%.
The largest change over the two decades was the increase in American adults who said they had no religious affiliation. In 2000, only 8% of those surveyed said they did not practice a religion, but in 2020 the number had jumped to 20%.
Continued below.
www.catholicnewsagency.com
Data collected by the polling firm Gallup surveyed 12,000 adults in the U.S. and found that from 2000 to 2020, the percentage of people with no religious affiliation spiked, while Protestant and Catholic populations declined.
In 2000, 57% of Americans identified as Protestant or nondenominational Christians. Over the following 20 years this group dropped more than 10 points to 46%. The Catholic population experienced a smaller yet still notable decline over the same time period, decreasing from 25% to 22%.
The largest change over the two decades was the increase in American adults who said they had no religious affiliation. In 2000, only 8% of those surveyed said they did not practice a religion, but in 2020 the number had jumped to 20%.
Continued below.

Poll: Americans’ religious preferences mostly unchanged over last 5 years
In 2020, 22% of Americans identified as Catholic and in 2024 the population remained similar at 21%. The Protestant population also only slightly declined from 46% to 45%.
