| | Willow City, ND | Kramer, ND | United States |
| Population | 104 | 36 | 329,725,481 |
| Female Population | 42.3% | 36.1% | 50.5% |
| Male Population | 57.7% | 63.9% | 49.5% |
| Median Age | 61.3 | 39.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 159 | 29 | 309,327,143 |
| Population - 2000 | 221 | 44 | 285,036,114 |
| Population - 1990 | 281 | 51 | 251,960,433 |
| Pop. 2000 to Now | -32.1% | -36.4% | 15.6% |
| Pop. 1990 to Now | -46.6% | -45.1% | 30.8% |
| space4 | | | |
| Population Density | 222.2 | 235.3 | 93.4 |
| Land Area | 0.5 | 0.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Willow City, ND | Kramer, ND | United States |
| Age 0 to 4 | 1.9% | 11.1% | 5.9% |
| Age 5 to 9 | 2.9% | 0.0% | 6.1% |
| Age 10 to 14 | 0.0% | 0.0% | 6.6% |
| Age 15 to 17 | 1.0% | 22.2% | 3.9% |
| Age 18 to 20 | 0.0% | 0.0% | 4.0% |
| Age 21 to 24 | 1.0% | 0.0% | 5.2% |
| Age 25 to 34 | 18.3% | 0.0% | 13.8% |
| Age 35 to 44 | 7.7% | 19.4% | 12.9% |
| Age 45 to 54 | 5.8% | 16.7% | 12.6% |
| Age 55 to 59 | 7.7% | 0.0% | 6.7% |
| Age 60 to 64 | 8.7% | 0.0% | 6.3% |
| Age 65 to 74 | 33.7% | 16.7% | 9.6% |
| Age 75 to 84 | 8.7% | 13.9% | 4.5% |
| Age 85 and over | 2.9% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Willow City, ND | Kramer, ND | United States |
| White | 94.2% | 47.2% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 2.9% | 52.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.9% | 0.0% | 3.2% |
| Hispanic | 0.0% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Willow City, ND | Kramer, ND | United States |
| Married Population | 44.4% | 56.3% | 49.8% |
| Currently Married | 40.4% | 56.3% | 48.0% |
| Married but Separated | 4.0% | 0.0% | 1.8% |
| Single Population | 55.6% | 43.8% | 50.2% |
| Never Married | 18.2% | 25.0% | 33.8% |
| Divorced | 22.2% | 18.8% | 10.8% |
| Widowed | 15.2% | 0.0% | 5.6% |
| space5 | | | |
| Household Size | 1.49 | 2.57 | 2.60 |
| Households | 70 | 14 | 124,010,992 |
| Family Households | 24 | 8 | 80,755,759 |
| Married couple, w/children | 4.2% | 37.5% | 30.5% |
| Married couple, no children | 83.3% | 62.5% | 42.9% |
| Non Family Households | 46 | 6 | 43,255,233 |
| Single householder, w/children | 8.3% | 0.0% | 15.8% |
| Single householder, no children | 4.2% | 0.0% | 10.8% |