| | Manchester-by-the-Sea, MA | New Canaan, CT | United States |
| Percent Religious | 57.7% | 64.0% | 49.4% |
| Baptist | 0.8% | 1.9% | 8.2% |
| Episcopalian | 1.6% | 2.5% | 0.6% |
| Catholic | 48.1% | 45.7% | 19.7% |
| Church of Jesus Christ | 0.3% | 0.5% | 2.1% |
| Lutheran | 0.4% | 0.9% | 2.4% |
| Pentecostal | 0.9% | 1.2% | 1.9% |
| Methodist | 0.7% | 2.1% | 4.0% |
| Presbyterian | 1.9% | 3.1% | 1.7% |
| Other Christian | 1.3% | 3.2% | 6.7% |
| Judaism | 1.2% | 2.0% | 0.7% |
| Eastern | 0.2% | 0.3% | 0.5% |
| Islam | 0.1% | 0.6% | 0.9% |