In this episode, we break down Ryan Burge’s demographic analysis of American Protestant churches and the uncomfortable math behind membership decline. Using age-distribution data across major denominations, Burge argues many churches aren’t stable—they’re simply being “buoyed by the Baby Boomers.” With modal ages in the late 60s, shrinking numbers of young adults, and fewer children in the pipeline, many groups are approaching a demographic tipping point. Decline won’t be gradual; it will feel slow and then sudden. Unless leaders plan now, some denominations could lose 30–50% of their adult members over the next couple of decades. The message is clear: this isn’t a theological or programmatic problem. It’s an actuarial problem, and the clock is already ticking.
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- Boomers are masking the decline.
Many denominations have 40–50% of their adults in the Baby Boomer generation—double their share in the general population—temporarily propping up attendance and finances. - The modal age tells the real story.
In several groups, the most common age is late 60s, signaling that large segments of active members will age out almost simultaneously. - Young adults are disappearing.
The share of people ages 18–40 has dropped sharply across both mainline and evangelical traditions, meaning fewer families, fewer children, and fewer future replacements. - Decline will be gradual—then sudden.
Projections show some denominations losing 30% of adults within 15 years and half within two decades, making early, incremental adjustments far wiser than emergency cuts later.
- Boomers are masking the decline.
See Ryan Burge’s article on this subject for more information.
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