| | Rock Creek, MN | Aurora, MN | United States |
| Population | 1,744 | 1,709 | 329,725,481 |
| Female Population | 50.6% | 48.7% | 50.5% |
| Male Population | 49.4% | 51.3% | 49.5% |
| Median Age | 38.4 | 50.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,622 | 1,681 | 309,327,143 |
| Population - 2000 | 1,119 | 1,850 | 285,036,114 |
| Population - 1990 | 1,040 | 1,965 | 251,960,433 |
| Pop. 2000 to Now | 48.2% | -13.0% | 15.6% |
| Pop. 1990 to Now | 59.4% | -18.1% | 30.8% |
| space4 | | | |
| Population Density | 40.6 | 450.5 | 93.4 |
| Land Area | 43.0 | 3.8 | 3,531,905.4 |
| Water Area | 0.3 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Rock Creek, MN | Aurora, MN | United States |
| Age 0 to 4 | 8.9% | 4.3% | 5.9% |
| Age 5 to 9 | 6.0% | 7.2% | 6.1% |
| Age 10 to 14 | 7.4% | 5.3% | 6.6% |
| Age 15 to 17 | 5.6% | 2.9% | 3.9% |
| Age 18 to 20 | 3.3% | 3.6% | 4.0% |
| Age 21 to 24 | 2.2% | 1.6% | 5.2% |
| Age 25 to 34 | 11.2% | 10.6% | 13.8% |
| Age 35 to 44 | 14.0% | 9.0% | 12.9% |
| Age 45 to 54 | 15.9% | 9.7% | 12.6% |
| Age 55 to 59 | 9.6% | 4.9% | 6.7% |
| Age 60 to 64 | 4.0% | 11.7% | 6.3% |
| Age 65 to 74 | 8.1% | 15.9% | 9.6% |
| Age 75 to 84 | 2.9% | 6.8% | 4.5% |
| Age 85 and over | 0.9% | 6.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Rock Creek, MN | Aurora, MN | United States |
| White | 96.0% | 99.7% | 59.4% |
| Black | 0.6% | 0.0% | 12.2% |
| Asian | 0.9% | 0.0% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.6% | 0.0% | 0.4% |
| Two or More Races | 0.9% | 0.2% | 3.2% |
| Hispanic | 0.9% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Rock Creek, MN | Aurora, MN | United States |
| Married Population | 51.1% | 39.4% | 49.8% |
| Currently Married | 49.9% | 36.7% | 48.0% |
| Married but Separated | 1.2% | 2.7% | 1.8% |
| Single Population | 48.9% | 60.6% | 50.2% |
| Never Married | 34.9% | 33.1% | 33.8% |
| Divorced | 8.4% | 13.4% | 10.8% |
| Widowed | 5.6% | 14.2% | 5.6% |
| space5 | | | |
| Household Size | 3.04 | 1.96 | 2.60 |
| Households | 571 | 848 | 124,010,992 |
| Family Households | 411 | 385 | 80,755,759 |
| Married couple, w/children | 36.5% | 14.0% | 30.5% |
| Married couple, no children | 37.2% | 47.0% | 42.9% |
| Non Family Households | 160 | 463 | 43,255,233 |
| Single householder, w/children | 15.6% | 25.7% | 15.8% |
| Single householder, no children | 10.7% | 13.2% | 10.8% |