| | McLean, VA | Gloucester Courthouse, VA | United States |
| Percent Religious | 46.4% | 41.6% | 49.4% |
| Baptist | 3.5% | 18.4% | 8.2% |
| Episcopalian | 1.7% | 2.0% | 0.6% |
| Catholic | 18.0% | 3.2% | 19.7% |
| Church of Jesus Christ | 1.6% | 1.3% | 2.1% |
| Lutheran | 1.6% | 0.6% | 2.4% |
| Pentecostal | 0.7% | 3.1% | 1.9% |
| Methodist | 5.1% | 8.8% | 4.0% |
| Presbyterian | 2.0% | 2.1% | 1.7% |
| Other Christian | 5.0% | 2.1% | 6.7% |
| Judaism | 0.5% | 0.0% | 0.7% |
| Eastern | 1.6% | 0.0% | 0.5% |
| Islam | 4.8% | 0.0% | 0.9% |