| | Londonderry township (Dauphin County), PA | Conewago township (Dauphin County), PA | United States |
| Percent Religious | 48.5% | 48.5% | 49.4% |
| Baptist | 2.2% | 2.2% | 8.2% |
| Episcopalian | 0.6% | 0.6% | 0.6% |
| Catholic | 15.3% | 15.3% | 19.7% |
| Church of Jesus Christ | 0.7% | 0.7% | 2.1% |
| Lutheran | 5.2% | 5.2% | 2.4% |
| Pentecostal | 1.4% | 1.4% | 1.9% |
| Methodist | 9.5% | 9.5% | 4.0% |
| Presbyterian | 4.4% | 4.4% | 1.7% |
| Other Christian | 6.0% | 6.0% | 6.7% |
| Judaism | 1.2% | 1.2% | 0.7% |
| Eastern | 0.9% | 0.9% | 0.5% |
| Islam | 0.9% | 0.9% | 0.9% |