| | Big Rock, IL | Superior, CO | United States |
| Population | 1,208 | 13,283 | 329,725,481 |
| Female Population | 49.8% | 49.7% | 50.5% |
| Male Population | 50.3% | 50.3% | 49.5% |
| Median Age | 45.9 | 36.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,133 | 12,483 | 309,327,143 |
| Population - 2000 | 1,058 | 9,011 | 285,036,114 |
| Population - 1990 | 1,055 | 255 | 251,960,433 |
| Pop. 2000 to Now | 6.0% | 48.9% | 15.6% |
| Pop. 1990 to Now | 6.3% | 5,160.0% | 30.8% |
| space4 | | | |
| Population Density | 280.0 | 3,365.3 | 93.4 |
| Land Area | 4.3 | 3.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Big Rock, IL | Superior, CO | United States |
| Age 0 to 4 | 6.2% | 5.7% | 5.9% |
| Age 5 to 9 | 7.4% | 9.6% | 6.1% |
| Age 10 to 14 | 7.9% | 7.7% | 6.6% |
| Age 15 to 17 | 3.1% | 5.4% | 3.9% |
| Age 18 to 20 | 3.6% | 3.0% | 4.0% |
| Age 21 to 24 | 0.7% | 3.2% | 5.2% |
| Age 25 to 34 | 12.1% | 11.6% | 13.8% |
| Age 35 to 44 | 8.1% | 17.3% | 12.9% |
| Age 45 to 54 | 11.8% | 17.8% | 12.6% |
| Age 55 to 59 | 11.3% | 6.0% | 6.7% |
| Age 60 to 64 | 9.1% | 3.8% | 6.3% |
| Age 65 to 74 | 8.3% | 6.8% | 9.6% |
| Age 75 to 84 | 7.3% | 2.1% | 4.5% |
| Age 85 and over | 3.0% | 0.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Big Rock, IL | Superior, CO | United States |
| White | 91.6% | 70.0% | 59.4% |
| Black | 0.0% | 0.3% | 12.2% |
| Asian | 0.6% | 16.8% | 5.6% |
| Native American | 0.2% | 0.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 4.3% | 3.4% | 3.2% |
| Hispanic | 3.4% | 8.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Big Rock, IL | Superior, CO | United States |
| Married Population | 70.4% | 64.0% | 49.8% |
| Currently Married | 69.1% | 62.7% | 48.0% |
| Married but Separated | 1.3% | 1.3% | 1.8% |
| Single Population | 29.6% | 36.0% | 50.2% |
| Never Married | 19.0% | 26.0% | 33.8% |
| Divorced | 6.4% | 8.8% | 10.8% |
| Widowed | 4.2% | 1.2% | 5.6% |
| space5 | | | |
| Household Size | 2.86 | 2.85 | 2.60 |
| Households | 422 | 4,668 | 124,010,992 |
| Family Households | 348 | 3,596 | 80,755,759 |
| Married couple, w/children | 39.4% | 48.6% | 30.5% |
| Married couple, no children | 52.3% | 35.9% | 42.9% |
| Non Family Households | 74 | 1,072 | 43,255,233 |
| Single householder, w/children | 4.3% | 12.8% | 15.8% |
| Single householder, no children | 4.0% | 2.7% | 10.8% |