Is Religion in the U.S. Growing, Shrinking, or Holding Steady? What the Latest Data Actually Shows

A Gap That Closed, Read Two Different Ways

In Pew's newest survey, women ages 18 to 24 are 57% religiously affiliated. Men the same age are 58%^[2]. The gap that has separated American men and women's religion for generations has all but vanished.

Read one way, that's a comeback story: young men rediscovering church. Fox, Axios, and Christian outlets have run with versions of it, pointing to Bible sales at a 21-year high and a Gallup number showing young men's sense that religion matters to them jumping from 28% to 42% in two years^[11][13]. Read the other way, it's a decline story wearing a disguise. Pew's own December 2025 report on the question says there is "no clear evidence" of a youth religious revival^[3]. Both claims cite real data. That contradiction is the whole story.

The reason both can be true at once comes down to a confusion baked into the word "religion" itself. Pollsters actually track four separate things: what you call yourself (affiliation), what you believe (belief in God, an afterlife), what you do (attendance, prayer), and whether a community counts you as one of its own (belonging)^[2]. These four don't move together. Belief in the U.S. runs far higher than practice — 83% of adults believe in God or a universal spirit, but only 33% attend services monthly^[2]. A headline that reports just one of the four as "religion" is the single most common way this topic gets distorted.

The other confusion sits inside the word "nones," shorthand for the religiously unaffiliated. It sounds like it means atheists. It doesn't. Of the 29% of U.S. adults who are unaffiliated, only 5% are atheist and 6% agnostic. The largest group, 19%, just says "nothing in particular" — and many of them still believe in God and still pray sometimes^[2]. Getting this wrong is how a shrinking-church story becomes, inaccurately, a story about mass atheism.

Fifty Years of One Direction, Then a Pause

For half a century the trend line pointed one way. Christians made up 78% of U.S. adults in 2007 and 71% by 2014. The unaffiliated rose from 16% to 23% over the same years^[1][2]. Attendance and belief slid too: weekly-or-near-weekly church attendance fell from about 42% in the early 2000s to around 30% recently, and belief in God dropped from 90% in 2001 to 74% in 2023^[6].

Then, sometime around 2020, the line went flat. Pew's 2023-24 Religious Landscape Study, based on nearly 37,000 adults and released in February 2025, found 62% of U.S. adults identify as Christian and 29% as unaffiliated — both numbers roughly unchanged since 2019 or 2020^[1][2]. Gallup, the long-running General Social Survey (GSS), and PRRI all describe something similar: a slowdown, possibly a stop^[4][6][7]. The GSS actually shows the unaffiliated share ticking down, from 28% in 2021 to 25% in 2024^[4].

Researchers who take the plateau seriously — Pew, data analyst Ryan Burge, and Gallup among them — make a simple argument. Several surveys, built differently and run independently, all bent at nearly the same time. When that happens, it's usually a real signal, not a fluke in one dataset^[1][4][6]. Burge calls it "inertia": American religion has hit something like a ceiling, and change from here will be slow^[4].

But five years is a short window, and the skeptics have a point worth taking seriously. Secularization researchers note the deep engines of decline — each new generation entering adulthood less religious than the last, rising education, delayed marriage — haven't reversed^[3][5][6]. A short flat stretch could be an artifact of COVID-era disruption, not a real turn. It also might reflect how people are being asked. Polling has shifted over the past decade from live phone interviews to online, self-answered surveys, and people report less religiosity when there's no interviewer listening^[15]. Some of the "flattening" could be more honest answers, not real change. Even the pollsters who found the plateau flag this. Pew's own language is "may have leveled off" — not "has reversed"^[1].

Where the Numbers Actually Sit

Setting the trend question aside, here's the current snapshot. Christians are 62% of U.S. adults, split mostly among evangelical Protestants (23%), Catholics (19%), mainline Protestants (11%), and historically Black Protestant churches (5%)^[2]. Non-Christian faiths together make up about 7%: roughly 2% Jewish and about 1% each Muslim, Buddhist, and Hindu^[2].

Not every Christian group is shrinking at the same rate. Mainline Protestant churches have fallen the most, from 18% of adults in 2007 to 11% now. Evangelicals slipped more gently, from 26% to 23%^[2]. Catholics, meanwhile, have held steady between 18% and 21% since 2014, sitting at 19% today — propped up in part by Hispanic Catholics, who now make up 36% of all U.S. Catholics^[2][17].

Immigration is doing real work here, in a way that's easy to overstate if you're not careful. Among immigrants, 58% are Christian, 25% are unaffiliated, and 14% belong to non-Christian faiths — compared with just 6% non-Christian among people born in the U.S.^[2]. That's why Muslim, Hindu, and Buddhist populations are growing fastest in percentage terms even though each still sits around 1% of the total population. Fast growth off a small base and a large share of the population are two different claims, and mixing them up makes small groups sound bigger than they are.

Same Size, Different Intensity

Even where the overall numbers hold flat, the people who remain religious can change in character — and two very different mechanisms produce that shift, easy to confuse but worth separating.

The first is mechanical, almost automatic. As casual or cultural believers drift out of a religious label and into "nothing in particular," the people who stay affiliated are, on average, the more committed ones. Nobody needs to change their mind for the remaining group's average intensity to tick up — the less devout just left the sample^[2].

The second is a genuine shift in views, and it's where religion and politics visibly fuse. PRRI's 2024 survey of more than 22,000 adults found roughly two-thirds of white evangelical Protestants qualify as either "Adherents" (30%) or "Sympathizers" (35%) of Christian nationalism — the belief that the U.S. should be explicitly defined and governed as a Christian nation. That support tracks closely with a 2024 vote for Trump^[9]. This is a real and separate phenomenon from simple devoutness: someone can pray daily and never endorse Christian nationalism, or rarely attend church and strongly endorse it. Treating "more religious" and "more politically hardline" as the same thing, in either direction, blurs a distinction the data keeps drawing.

The Fight Over the Young, Both Sides' Best Evidence

This is where the loudest argument lives, and it deserves both sides in full.

The revival case rests on a real, if narrow, set of findings. Barna Group's 2025 data shows 43% of men attending church weekly versus 36% of women — the widest gender gap in church attendance the firm has measured in 25 years, and a reversal of the pattern that held for a quarter century^[10]. The UK Bible Society's "Quiet Revival" report found church attendance among young Britons 18 to 24 rising from 4% to 16% since 2018, with young men's attendance climbing from 4% to 21%^[11]. Bible sales in the U.S. hit a 21-year high in 2025^[11]. And Gallup found the share of American men 18 to 29 who call religion "very important" jumped from 28% in 2022-23 to 42% in 2024-25^[13].

The leaving case answers with a different kind of evidence: the actual behavior surveys, not the attitude ones. Pew's December 2025 report is blunt: there is "no clear evidence" of a nationwide revival among young adults. Affiliation among 18-to-30-year-olds was 55% in 2025, against 57% in 2020 — essentially unchanged^[3]. PRRI's most recent data found weekly attendance flat at roughly 20% to 21% for both young men and young women between 2024 and 2025, with no rise for men^[8]. What actually moved was women: those calling religion "very important" fell from 51% in 2012-13 to 29% in 2024-25, and unaffiliated young women rose from 29% in 2013 to 40% in 2024^[7][8]. On this reading, the vanishing gender gap isn't men returning. It's women leaving, and men just staying where they already were.

Each side's blind spot is real. The revival case leans heavily on a single Gallup attitude question, commercial book sales, and British survey data getting imported into an American argument as though it were domestic evidence^[3][8]. The leaving case, meanwhile, could be too quick to wave off the Gallup importance jump — subjective attitudes sometimes shift before behavior catches up, and dismissing every early signal as noise risks missing a real one^[13].

That leaves a fifth position, held by demographers across the spectrum: it's simply too soon to know. The same survey-mode shift muddying the plateau question — phone versus online polling — muddies this one too, since it changes how honestly people report religiosity depending on whether a stranger is listening^[15]. Pew notes that past generations of young Americans have often grown more religious as they aged and started families. Whether today's young adults will do the same, or break that pattern for good, is a question that literally cannot be answered until more time passes^[3].

What Would Actually Settle This

Several structural forces sit underneath every one of these arguments, regardless of who turns out to be right. Generational replacement is the biggest one: about 38% of Americans 18 to 29 are unaffiliated, far more than among the elderly, so simply replacing older cohorts with younger ones keeps pulling the numbers down by default^[3][7]. Immigration cuts against that in specific pockets, sustaining Catholic numbers and non-Christian growth^[2]. Religious identity itself has become a political signal, cutting in both directions — fused with the right through Christian nationalism, while others quietly drop the label because it now reads as conservative^[9]. And the U.S. remains a genuine outlier: far more religious than Western Europe, where only about 37% of people call themselves religious at all, a reminder that decline isn't automatic just because a country gets richer^[6].

Where the sources agree to disagree is instructive too. Pew and Gallup hedge hard, leading with the short data window rather than a storyline^[1][6]. PRRI, methodologically serious but with a secular-leaning readership, centers Christian nationalism more heavily than other pollsters do^[7][9]. Barna, a commercial firm that sells research to churches, reports higher attendance numbers and leads with the encouraging version for its audience^[10]. Outlets like Axios lean into the "vibe shift" framing with less hedging than the pollsters themselves apply to the same numbers^[3]. None of that means anyone is fabricating data — it means each source is measuring something real while choosing what to feature for the readers it serves.

What would actually resolve the argument isn't more single polls or another season of Bible sales figures. It's a few more years of the same behavioral surveys — attendance, not just stated importance — run on a consistent method, long enough to tell a genuine turn apart from a pandemic-era blip. Until then, the honest answer is the one Pew itself keeps landing on: the decline has clearly slowed, the shape of American religion is stable for now, and whether that's a floor or just a pause is a question the data can't yet answer^[1][3].