| | New Leipzig, ND | Belle Fourche, SD | United States |
| Population | 188 | 5,561 | 329,725,481 |
| Female Population | 38.8% | 50.3% | 50.5% |
| Male Population | 61.2% | 49.7% | 49.5% |
| Median Age | 61.2 | 38.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 221 | 5,614 | 309,327,143 |
| Population - 2000 | 274 | 4,565 | 285,036,114 |
| Population - 1990 | 326 | 4,335 | 251,960,433 |
| Pop. 2000 to Now | -27.0% | 25.8% | 15.6% |
| Pop. 1990 to Now | -38.7% | 32.5% | 30.8% |
| space4 | | | |
| Population Density | 211.2 | 628.5 | 93.4 |
| Land Area | 0.9 | 8.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | New Leipzig, ND | Belle Fourche, SD | United States |
| Age 0 to 4 | 0.5% | 4.6% | 5.9% |
| Age 5 to 9 | 1.1% | 7.2% | 6.1% |
| Age 10 to 14 | 5.3% | 5.5% | 6.6% |
| Age 15 to 17 | 4.3% | 5.4% | 3.9% |
| Age 18 to 20 | 1.6% | 4.6% | 4.0% |
| Age 21 to 24 | 4.3% | 4.7% | 5.2% |
| Age 25 to 34 | 12.8% | 12.1% | 13.8% |
| Age 35 to 44 | 2.7% | 12.2% | 12.9% |
| Age 45 to 54 | 9.6% | 13.2% | 12.6% |
| Age 55 to 59 | 4.3% | 5.4% | 6.7% |
| Age 60 to 64 | 12.2% | 9.4% | 6.3% |
| Age 65 to 74 | 24.5% | 7.8% | 9.6% |
| Age 75 to 84 | 13.3% | 5.7% | 4.5% |
| Age 85 and over | 3.7% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | New Leipzig, ND | Belle Fourche, SD | United States |
| White | 92.0% | 87.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.4% | 5.6% |
| Native American | 0.0% | 1.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.5% | 0.2% |
| Other | 0.0% | 0.6% | 0.4% |
| Two or More Races | 0.5% | 3.1% | 3.2% |
| Hispanic | 7.4% | 7.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | New Leipzig, ND | Belle Fourche, SD | United States |
| Married Population | 60.6% | 49.0% | 49.8% |
| Currently Married | 60.6% | 47.5% | 48.0% |
| Married but Separated | 0.0% | 1.4% | 1.8% |
| Single Population | 39.4% | 51.0% | 50.2% |
| Never Married | 25.7% | 29.0% | 33.8% |
| Divorced | 8.6% | 17.0% | 10.8% |
| Widowed | 5.1% | 5.0% | 5.6% |
| space5 | | | |
| Household Size | 2.09 | 2.35 | 2.60 |
| Households | 90 | 2,327 | 124,010,992 |
| Family Households | 57 | 1,302 | 80,755,759 |
| Married couple, w/children | 10.5% | 41.8% | 30.5% |
| Married couple, no children | 80.7% | 41.5% | 42.9% |
| Non Family Households | 33 | 1,025 | 43,255,233 |
| Single householder, w/children | 3.5% | 9.8% | 15.8% |
| Single householder, no children | 5.3% | 6.9% | 10.8% |