| | Niles, MI | Adams township (Arenac County), MI | United States |
| Percent Religious | 46.9% | 45.4% | 49.4% |
| Baptist | 4.2% | 0.3% | 8.2% |
| Episcopalian | 0.3% | 0.1% | 0.6% |
| Catholic | 11.0% | 27.4% | 19.7% |
| Church of Jesus Christ | 0.8% | 1.0% | 2.1% |
| Lutheran | 7.3% | 6.7% | 2.4% |
| Pentecostal | 2.7% | 0.8% | 1.9% |
| Methodist | 4.1% | 5.6% | 4.0% |
| Presbyterian | 2.5% | 0.2% | 1.7% |
| Other Christian | 11.8% | 3.2% | 6.7% |
| Judaism | 0.2% | 0.0% | 0.7% |
| Eastern | 0.0% | 0.0% | 0.5% |
| Islam | 2.0% | 0.0% | 0.9% |