| | St. Croix Falls, WI | Blaine, MN | United States |
| Population | 1,859 | 68,999 | 329,725,481 |
| Female Population | 55.0% | 50.2% | 50.5% |
| Male Population | 45.0% | 49.8% | 49.5% |
| Median Age | 50 | 37.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,128 | 57,409 | 309,327,143 |
| Population - 2000 | 2,033 | 44,942 | 285,036,114 |
| Population - 1990 | 1,640 | 38,975 | 251,960,433 |
| Pop. 2000 to Now | 1.3% | 48.4% | 15.6% |
| Pop. 1990 to Now | 25.6% | 71.1% | 30.8% |
| space4 | | | |
| Population Density | 372.6 | 2,095.8 | 93.4 |
| Land Area | 5.0 | 32.9 | 3,531,905.4 |
| Water Area | 0.1 | 1.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | St. Croix Falls, WI | Blaine, MN | United States |
| Age 0 to 4 | 3.0% | 6.5% | 5.9% |
| Age 5 to 9 | 4.0% | 6.5% | 6.1% |
| Age 10 to 14 | 7.2% | 8.4% | 6.6% |
| Age 15 to 17 | 5.4% | 5.0% | 3.9% |
| Age 18 to 20 | 3.2% | 2.9% | 4.0% |
| Age 21 to 24 | 3.0% | 4.6% | 5.2% |
| Age 25 to 34 | 9.7% | 12.7% | 13.8% |
| Age 35 to 44 | 10.3% | 14.9% | 12.9% |
| Age 45 to 54 | 12.2% | 12.8% | 12.6% |
| Age 55 to 59 | 11.5% | 6.7% | 6.7% |
| Age 60 to 64 | 9.0% | 6.8% | 6.3% |
| Age 65 to 74 | 9.8% | 8.4% | 9.6% |
| Age 75 to 84 | 5.7% | 3.1% | 4.5% |
| Age 85 and over | 6.1% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | St. Croix Falls, WI | Blaine, MN | United States |
| White | 98.9% | 74.5% | 59.4% |
| Black | 0.0% | 7.6% | 12.2% |
| Asian | 0.0% | 8.2% | 5.6% |
| Native American | 0.3% | 0.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.5% | 0.2% | 0.4% |
| Two or More Races | 0.0% | 3.7% | 3.2% |
| Hispanic | 0.2% | 5.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | St. Croix Falls, WI | Blaine, MN | United States |
| Married Population | 47.4% | 55.7% | 49.8% |
| Currently Married | 46.7% | 54.9% | 48.0% |
| Married but Separated | 0.8% | 0.8% | 1.8% |
| Single Population | 52.6% | 44.3% | 50.2% |
| Never Married | 28.8% | 29.7% | 33.8% |
| Divorced | 16.2% | 10.9% | 10.8% |
| Widowed | 7.6% | 3.7% | 5.6% |
| space5 | | | |
| Household Size | 2.05 | 2.80 | 2.60 |
| Households | 880 | 24,568 | 124,010,992 |
| Family Households | 474 | 17,575 | 80,755,759 |
| Married couple, w/children | 19.0% | 39.6% | 30.5% |
| Married couple, no children | 52.7% | 40.6% | 42.9% |
| Non Family Households | 406 | 6,993 | 43,255,233 |
| Single householder, w/children | 19.4% | 12.3% | 15.8% |
| Single householder, no children | 8.9% | 7.5% | 10.8% |