Distribution (in percentage) of main religious groups, Arthabaska (Municipalité régionale de comté), 2011 and 2021
| Religious groups | 2011 | 2021 |
|---|---|---|
| Buddhist | 0.0 | 0.1 |
| Anglican | 0.0 | 0.0 |
| Baptist | 0.3 | 0.2 |
| Catholic | 90.7 | 69.7 |
| Christian Orthodox | 0.0 | 0.1 |
| Lutheran | 0.0 | 0.0 |
| Pentecostal and other Charismatic | 0.2 | 0.2 |
| Presbyterian | 0.0 | 0.0 |
| United Church | 0.0 | 0.0 |
| Other - Christians | 1.6 | 6.7 |
| Hindu | 0.0 | 0.0 |
| Jewish | 0.0 | 0.0 |
| Muslim | 0.3 | 0.8 |
| Sikh | 0.0 | 0.0 |
| Traditional (North American Indigenous) spirituality | 0.0 | 0.0 |
| Other religions and spiritual traditions | 0.1 | 0.2 |
| No religion and secular perspectives | 6.8 | 21.9 |
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