Over roughly the course of my lifetime the percentage of Americans identifying as Christian has declined by 25%.
According to data from the General Social Survey,
- In 1972, 9 out of 10 Americans (90%) identified as Christian
- In 2024, just 6.5 out of 10 Americans (65%) identified as Christian
So What?
All conversations about decline in particular traditions or denominations or more granular discussion about particular churches or congregations should begin with a general awareness of this cultural shift.
- Did you realize the decline was this significant?
- What can you do to increase awareness within your circle of influence?
- How does this foundational knowledge inform the ways you approach membership within your local community of faith?
To learn more about how declining membership in Mainline Protestant denominations as well as in other Protestant expressions of Christianity, check out these posts here on So What Faith:
- My Religion is Dying: A Deep Dive into Mainline Decline (June 2024) – lincludes inks to 50 prior posts on So What Faith
- Southern Baptist Membership Drops Every Year Since 2006 (July 2025) – data from SBC Annuals
- Slow Fade: A New Look at Mainline Protestant Decline (August 2025) – data from 2024 PRRI Census of American Religion
- Decline Upon Decline: Metropolitan Community Churches (December 2025) – data from Association of Religion Data Archives