| | Epping, ND | Arnold, NE | United States |
| Population | 85 | 917 | 329,725,481 |
| Female Population | 23.5% | 50.3% | 50.5% |
| Male Population | 76.5% | 49.7% | 49.5% |
| Median Age | 51.4 | 33.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 101 | 595 | 309,327,143 |
| Population - 2000 | 79 | 630 | 285,036,114 |
| Population - 1990 | 64 | 679 | 251,960,433 |
| Pop. 2000 to Now | 86.1% | -11.4% | 15.6% |
| Pop. 1990 to Now | 129.7% | -17.8% | 30.8% |
| space4 | | | |
| Population Density | 227.3 | 1,368.7 | 93.4 |
| Land Area | 0.4 | 0.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Epping, ND | Arnold, NE | United States |
| Age 0 to 4 | 2.4% | 14.8% | 5.9% |
| Age 5 to 9 | 2.4% | 5.9% | 6.1% |
| Age 10 to 14 | 2.4% | 9.4% | 6.6% |
| Age 15 to 17 | 0.0% | 2.7% | 3.9% |
| Age 18 to 20 | 0.0% | 4.3% | 4.0% |
| Age 21 to 24 | 16.5% | 1.0% | 5.2% |
| Age 25 to 34 | 3.5% | 14.1% | 13.8% |
| Age 35 to 44 | 7.1% | 11.8% | 12.9% |
| Age 45 to 54 | 34.1% | 9.3% | 12.6% |
| Age 55 to 59 | 15.3% | 7.0% | 6.7% |
| Age 60 to 64 | 3.5% | 4.0% | 6.3% |
| Age 65 to 74 | 11.8% | 8.5% | 9.6% |
| Age 75 to 84 | 1.2% | 4.9% | 4.5% |
| Age 85 and over | 0.0% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Epping, ND | Arnold, NE | United States |
| White | 92.9% | 94.1% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 5.9% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.2% | 1.9% | 3.2% |
| Hispanic | 0.0% | 4.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Epping, ND | Arnold, NE | United States |
| Married Population | 38.0% | 54.1% | 49.8% |
| Currently Married | 38.0% | 52.6% | 48.0% |
| Married but Separated | 0.0% | 1.6% | 1.8% |
| Single Population | 62.0% | 45.9% | 50.2% |
| Never Married | 22.8% | 27.9% | 33.8% |
| Divorced | 38.0% | 10.9% | 10.8% |
| Widowed | 1.3% | 7.0% | 5.6% |
| space5 | | | |
| Household Size | 1.89 | 2.58 | 2.60 |
| Households | 45 | 353 | 124,010,992 |
| Family Households | 34 | 230 | 80,755,759 |
| Married couple, w/children | 8.8% | 28.7% | 30.5% |
| Married couple, no children | 23.5% | 42.6% | 42.9% |
| Non Family Households | 11 | 123 | 43,255,233 |
| Single householder, w/children | 2.9% | 27.8% | 15.8% |
| Single householder, no children | 64.7% | 0.9% | 10.8% |