| | Fontana-on-Geneva Lake, WI | Indianapolis, IN | United States |
| Percent Religious | 43.8% | 43.0% | 49.4% |
| Baptist | 1.0% | 5.7% | 8.2% |
| Episcopalian | 0.4% | 0.4% | 0.6% |
| Catholic | 19.5% | 11.5% | 19.7% |
| Church of Jesus Christ | 0.5% | 0.6% | 2.1% |
| Lutheran | 11.6% | 1.3% | 2.4% |
| Pentecostal | 0.3% | 1.6% | 1.9% |
| Methodist | 4.5% | 5.0% | 4.0% |
| Presbyterian | 2.8% | 2.2% | 1.7% |
| Other Christian | 3.2% | 13.3% | 6.7% |
| Judaism | 0.0% | 0.7% | 0.7% |
| Eastern | 0.0% | 0.3% | 0.5% |
| Islam | 0.0% | 0.3% | 0.9% |