| Index | Spring Gap | Maryland | National |
| Median home price | $0 | $517,567 | $326,622 |
| Median rent asked | $0 | $1,931 | $1,444 |
| Avg. people per household | 1.0 | 2.6 | 2.6 |
| Owner occupied households | 100.0% | 66.5% | 63.6% |
| Renter occupied households | 0.0% | 33.5% | 36.4% |

| Population | Home Price | National Avg. | |
| Bier, MD | 228 | $0 | 100% |
| Oldtown, MD | 31 | $0 | 100% |
| Clarysville, MD | 42 | $0 | 100% |
| National, MD | 64 | $0 | 100% |
| Danville, MD | 543 | $0 | 100% |
| Spring Gap, MD | 40 | $0 | 100% |
| Population | Home Price | National Avg. | |
| Kerrtown, PA | 40 | $0 | 100% |
| St. Rosa, MN | 40 | $289,897 | 11% |
| Sequoia Crest, CA | 40 | $0 | 100% |
| Seneca, SD | 40 | $70,254 | 78% |
| Santa Anna CDP, TX | 40 | $0 | 100% |
| Spring Gap, MD | 40 | $0 | 100% |