| | Gibraltar, WI | Coralville, IA | United States |
| Population | 818 | 22,226 | 329,725,481 |
| Female Population | 54.9% | 49.4% | 50.5% |
| Male Population | 45.1% | 50.6% | 49.5% |
| Median Age | 62.7 | 32.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,021 | 18,946 | 309,327,143 |
| Population - 2000 | 1,063 | 15,123 | 285,036,114 |
| Population - 1990 | 939 | 10,347 | 251,960,433 |
| Pop. 2000 to Now | -1.4% | 48.7% | 15.6% |
| Pop. 1990 to Now | 11.6% | 117.3% | 30.8% |
| space4 | | | |
| Population Density | 24.2 | 1,770.0 | 93.4 |
| Land Area | 33.8 | 12.6 | 3,531,905.4 |
| Water Area | 114.2 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Gibraltar, WI | Coralville, IA | United States |
| Age 0 to 4 | 2.4% | 7.9% | 5.9% |
| Age 5 to 9 | 3.8% | 5.0% | 6.1% |
| Age 10 to 14 | 3.9% | 4.8% | 6.6% |
| Age 15 to 17 | 5.5% | 3.6% | 3.9% |
| Age 18 to 20 | 1.0% | 2.8% | 4.0% |
| Age 21 to 24 | 1.1% | 8.3% | 5.2% |
| Age 25 to 34 | 2.3% | 20.4% | 13.8% |
| Age 35 to 44 | 9.2% | 14.2% | 12.9% |
| Age 45 to 54 | 9.9% | 10.4% | 12.6% |
| Age 55 to 59 | 6.1% | 5.7% | 6.7% |
| Age 60 to 64 | 9.9% | 4.3% | 6.3% |
| Age 65 to 74 | 24.8% | 7.8% | 9.6% |
| Age 75 to 84 | 17.4% | 2.9% | 4.5% |
| Age 85 and over | 2.7% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Gibraltar, WI | Coralville, IA | United States |
| White | 88.8% | 67.4% | 59.4% |
| Black | 0.0% | 13.0% | 12.2% |
| Asian | 0.0% | 9.7% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.1% | 3.1% | 3.2% |
| Hispanic | 9.2% | 6.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Gibraltar, WI | Coralville, IA | United States |
| Married Population | 68.8% | 48.7% | 49.8% |
| Currently Married | 68.8% | 47.5% | 48.0% |
| Married but Separated | 0.0% | 1.3% | 1.8% |
| Single Population | 31.2% | 51.3% | 50.2% |
| Never Married | 16.7% | 40.3% | 33.8% |
| Divorced | 6.7% | 8.3% | 10.8% |
| Widowed | 7.8% | 2.7% | 5.6% |
| space5 | | | |
| Household Size | 2.18 | 2.28 | 2.60 |
| Households | 376 | 9,259 | 124,010,992 |
| Family Households | 267 | 5,024 | 80,755,759 |
| Married couple, w/children | 26.2% | 35.2% | 30.5% |
| Married couple, no children | 67.4% | 42.4% | 42.9% |
| Non Family Households | 109 | 4,235 | 43,255,233 |
| Single householder, w/children | 0.0% | 14.7% | 15.8% |
| Single householder, no children | 6.4% | 7.7% | 10.8% |