In short
In the 2021 census, 71.3% of Poles (27.1 million) declared themselves Roman Catholic, down sharply from 87.6% (33.7 million) in 2011. The share declaring no faith almost tripled to 6.9%, and the share refusing to answer the religion question rose to 20.5%. CBOS tracks the same shift in lived faith: those who call themselves believers slipped from 94% in 1992 to 87% in 2021, while regular religious practice fell from 70% to 43%. The decline is steepest among the young, where regular practice collapsed from 69% in 1992 to 23%.
- In the 2021 census, 71.3% of Poles (27.1 million) declared themselves Roman Catholic, down from 87.6% (33.7 million) in 2011 (GUS).
- People declaring no faith rose to 6.9% in 2021, up from 2.4% in 2011, almost tripling (GUS).
- Poles who call themselves believers fell from 94% in 1992 to 87% in 2021, and regular practice fell from 70% to 43% (CBOS).
- Among young Poles, regular religious practice collapsed from 69% in 1992 to just 23% (CBOS).
Poland has long been one of the most Catholic countries in Europe, but that picture is changing fast. In the 2021 National Census, 71.3% of Poles (27.1 million people) declared themselves Roman Catholic, a steep fall from 87.6% (33.7 million) just ten years earlier, according to GUS (Statistics Poland). At the same time the share declaring no faith almost tripled and the share refusing to answer the religion question climbed to more than one in five. CBOS, Poland's public opinion research center, records the same trend in belief and practice going back to 1992, and the Institute for Catholic Church Statistics tracks weekly Mass attendance. The figures below draw on GUS, CBOS, and ISKK, the most authoritative sources on Christianity in Poland.
Key findings at a glance
| Metric | Value | Year | Source |
|---|---|---|---|
| Roman Catholics | 71.3% (27.1 million) | 2021 | GUS (Statistics Poland, 2021 Census) |
| People declaring no faith | 6.9% | 2021 | GUS (Statistics Poland, 2021 Census) |
| Refused to answer the religion question | 20.5% | 2021 | GUS (Statistics Poland, 2021 Census) |
| Poles who call themselves believers | 87% | 2021 | CBOS |
| Regular religious practice | 43% | 2021 | CBOS |
| Weekly Mass attendance (dominicantes) | 28% | 2021 | Institute for Catholic Church Statistics |
Still Catholic, but falling fast
Poland remains overwhelmingly Roman Catholic, but the 2021 census recorded the sharpest drop in a generation. Catholic self-identification fell by more than 16 percentage points in a decade, while both non-belief and non-response rose steeply, reshaping how Poles answer the religion question.
In the 2021 census, 71.3% of Poles (27.1 million people) declared themselves Roman Catholic, down from 87.6% (33.7 million) in 2011, according to GUS.
People declaring no faith rose to 6.9% in 2021, up from 2.4% in 2011, almost tripling, according to GUS.
| Statistic | Value | Year | Source |
|---|---|---|---|
| Roman Catholics 2021 | 71.3% (27.1 million) | 2021 | GUS (Statistics Poland, 2021 Census) |
| Roman Catholics 2011 | 87.6% (33.7 million) | 2011 | GUS (Statistics Poland, 2021 Census) |
| People declaring no faith 2021 | 6.9% | 2021 | GUS (Statistics Poland, 2021 Census) |
| People declaring no faith 2011 | 2.4% | 2011 | GUS (Statistics Poland, 2021 Census) |
| Refused to answer 2021 | 20.5% | 2021 | GUS (Statistics Poland, 2021 Census) |
| Refused to answer 2011 | 7.1% | 2011 | GUS (Statistics Poland, 2021 Census) |
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Belief versus practice
Census self-identification is only one measure. CBOS has tracked belief and practice since 1992, and its data show a slow erosion of self-declared faith alongside a much steeper fall in regular practice. Poles are more likely to call themselves believers than to attend services regularly, and the gap between the two has widened.
Poles who call themselves believers fell from 94% in 1992 to 87% in 2021, according to CBOS.
Regular religious practice fell from 70% in 1992 to 43% in 2021, according to CBOS.
| Statistic | Value | Year | Source |
|---|---|---|---|
| Call themselves believers 1992 | 94% | 1992 | CBOS |
| Call themselves believers 2021 | 87% | 2021 | CBOS |
| Regular practice 1992 | 70% | 1992 | CBOS |
| Regular practice 2021 | 43% | 2021 | CBOS |
| Weekly Mass attendance 2019 (dominicantes) | 37% | 2019 | Institute for Catholic Church Statistics |
| Weekly Mass attendance 2021 (dominicantes) | 28% | 2021 | Institute for Catholic Church Statistics |
The youth collapse
The decline is sharpest among the young. Where regular practice for the population as a whole roughly halved since 1992, among young Poles it fell by two thirds, a generational break that points to a much less religious Poland in the decades ahead.
Among young Poles, regular religious practice fell from 69% in 1992 to 23%, according to CBOS.
Weekly Mass attendance (dominicantes) fell from 37% in 2019 to 28% in 2021, according to the Institute for Catholic Church Statistics.
| Statistic | Value | Year | Source |
|---|---|---|---|
| Young Poles, regular practice 1992 | 69% | 1992 | CBOS |
| Young Poles, regular practice recent | 23% | 2021 | CBOS |
| All Poles, regular practice 1992 | 70% | 1992 | CBOS |
| All Poles, regular practice 2021 | 43% | 2021 | CBOS |
| Weekly Mass attendance 2019 | 37% | 2019 | Institute for Catholic Church Statistics |
| Weekly Mass attendance 2021 | 28% | 2021 | Institute for Catholic Church Statistics |
How we compiled these statistics
Every number on this page is traceable to a primary source and dated to the year the data were collected. Catholic identification, non-belief, and non-response shares come from GUS (Statistics Poland), drawn from the 2021 National Census and compared with the 2011 census, based on self-declaration. Trends in belief and regular practice come from CBOS, Poland's public opinion research center, which has surveyed religiosity since 1992. Weekly Mass attendance (dominicantes) comes from the Institute for Catholic Church Statistics. Where data years differ, we use the most recent published year and label it.
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