| | Wahpeton, ND | Breckenridge, MN | United States |
| Population | 7,928 | 3,439 | 329,725,481 |
| Female Population | 46.6% | 51.3% | 50.5% |
| Male Population | 53.4% | 48.7% | 49.5% |
| Median Age | 33.9 | 41.5 | 38.4 |
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| Population - 2010 | 7,762 | 3,396 | 309,327,143 |
| Population - 2000 | 8,586 | 3,559 | 285,036,114 |
| Population - 1990 | 8,751 | 3,708 | 251,960,433 |
| Pop. 2000 to Now | -10.0% | -11.9% | 15.6% |
| Pop. 1990 to Now | -11.7% | -15.4% | 30.8% |
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| Population Density | 1,520.2 | 1,359.8 | 93.4 |
| Land Area | 5.2 | 2.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Wahpeton, ND | Breckenridge, MN | United States |
| Age 0 to 4 | 5.2% | 7.9% | 5.9% |
| Age 5 to 9 | 3.8% | 5.9% | 6.1% |
| Age 10 to 14 | 5.0% | 6.5% | 6.6% |
| Age 15 to 17 | 2.5% | 3.3% | 3.9% |
| Age 18 to 20 | 15.5% | 2.5% | 4.0% |
| Age 21 to 24 | 8.1% | 4.7% | 5.2% |
| Age 25 to 34 | 11.5% | 12.0% | 13.8% |
| Age 35 to 44 | 8.2% | 11.6% | 12.9% |
| Age 45 to 54 | 7.7% | 11.3% | 12.6% |
| Age 55 to 59 | 6.7% | 9.7% | 6.7% |
| Age 60 to 64 | 9.0% | 6.1% | 6.3% |
| Age 65 to 74 | 9.7% | 7.0% | 9.6% |
| Age 75 to 84 | 4.4% | 4.3% | 4.5% |
| Age 85 and over | 3.0% | 7.2% | 1.9% |
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| Race | | | |
| | Wahpeton, ND | Breckenridge, MN | United States |
| White | 88.5% | 91.8% | 59.4% |
| Black | 1.4% | 0.3% | 12.2% |
| Asian | 0.4% | 0.0% | 5.6% |
| Native American | 1.8% | 1.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.8% | 3.1% | 3.2% |
| Hispanic | 4.0% | 3.5% | 18.4% |
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| Marriage & Family | | | |
| | Wahpeton, ND | Breckenridge, MN | United States |
| Married Population | 36.8% | 38.5% | 49.8% |
| Currently Married | 35.3% | 36.8% | 48.0% |
| Married but Separated | 1.5% | 1.7% | 1.8% |
| Single Population | 63.2% | 61.5% | 50.2% |
| Never Married | 43.1% | 37.6% | 33.8% |
| Divorced | 11.7% | 12.8% | 10.8% |
| Widowed | 8.4% | 11.0% | 5.6% |
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| Household Size | 2.08 | 2.22 | 2.60 |
| Households | 3,280 | 1,498 | 124,010,992 |
| Family Households | 1,593 | 764 | 80,755,759 |
| Married couple, w/children | 23.9% | 25.9% | 30.5% |
| Married couple, no children | 47.0% | 39.4% | 42.9% |
| Non Family Households | 1,687 | 734 | 43,255,233 |
| Single householder, w/children | 20.3% | 25.5% | 15.8% |
| Single householder, no children | 8.8% | 9.2% | 10.8% |