| | Naperville, IL | Village of Oak Creek (Big Park), AZ | United States |
| Percent Religious | 72.0% | 26.2% | 49.4% |
| Baptist | 0.4% | 2.1% | 8.2% |
| Episcopalian | 0.6% | 0.5% | 0.6% |
| Catholic | 41.9% | 7.9% | 19.7% |
| Church of Jesus Christ | 0.4% | 4.7% | 2.1% |
| Lutheran | 5.6% | 1.6% | 2.4% |
| Pentecostal | 1.9% | 1.6% | 1.9% |
| Methodist | 3.1% | 0.9% | 4.0% |
| Presbyterian | 2.8% | 0.6% | 1.7% |
| Other Christian | 7.1% | 5.9% | 6.7% |
| Judaism | 0.2% | 0.2% | 0.7% |
| Eastern | 1.2% | 0.1% | 0.5% |
| Islam | 6.6% | 0.0% | 0.9% |