| | Marana, AZ | St. George, UT | United States |
| Population | 50,834 | 92,875 | 329,725,481 |
| Female Population | 50.9% | 51.1% | 50.5% |
| Male Population | 49.1% | 49.0% | 49.5% |
| Median Age | 41.2 | 37.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 34,745 | 72,842 | 309,327,143 |
| Population - 2000 | 13,556 | 49,663 | 285,036,114 |
| Population - 1990 | 2,187 | 28,502 | 251,960,433 |
| Pop. 2000 to Now | 278.5% | 86.0% | 15.6% |
| Pop. 1990 to Now | 2,246.0% | 224.1% | 30.8% |
| space4 | | | |
| Population Density | 420.2 | 1,208.3 | 93.4 |
| Land Area | 121.0 | 76.9 | 3,531,905.4 |
| Water Area | 0.7 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Marana, AZ | St. George, UT | United States |
| Age 0 to 4 | 6.0% | 6.4% | 5.9% |
| Age 5 to 9 | 7.0% | 6.7% | 6.1% |
| Age 10 to 14 | 6.8% | 7.7% | 6.6% |
| Age 15 to 17 | 3.0% | 4.5% | 3.9% |
| Age 18 to 20 | 2.6% | 4.4% | 4.0% |
| Age 21 to 24 | 4.5% | 6.0% | 5.2% |
| Age 25 to 34 | 11.0% | 11.6% | 13.8% |
| Age 35 to 44 | 14.7% | 10.6% | 12.9% |
| Age 45 to 54 | 11.5% | 9.5% | 12.6% |
| Age 55 to 59 | 5.3% | 4.6% | 6.7% |
| Age 60 to 64 | 5.9% | 5.4% | 6.3% |
| Age 65 to 74 | 13.7% | 12.0% | 9.6% |
| Age 75 to 84 | 6.9% | 7.1% | 4.5% |
| Age 85 and over | 1.3% | 3.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Marana, AZ | St. George, UT | United States |
| White | 61.6% | 81.0% | 59.4% |
| Black | 2.9% | 0.6% | 12.2% |
| Asian | 3.6% | 1.0% | 5.6% |
| Native American | 0.8% | 1.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.3% | 0.9% | 0.2% |
| Other | 0.3% | 0.3% | 0.4% |
| Two or More Races | 3.0% | 2.5% | 3.2% |
| Hispanic | 27.6% | 12.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Marana, AZ | St. George, UT | United States |
| Married Population | 64.0% | 59.7% | 49.8% |
| Currently Married | 62.8% | 58.0% | 48.0% |
| Married but Separated | 1.2% | 1.7% | 1.8% |
| Single Population | 36.0% | 40.3% | 50.2% |
| Never Married | 23.7% | 25.1% | 33.8% |
| Divorced | 8.4% | 9.8% | 10.8% |
| Widowed | 3.9% | 5.4% | 5.6% |
| space5 | | | |
| Household Size | 2.64 | 2.81 | 2.60 |
| Households | 19,020 | 32,753 | 124,010,992 |
| Family Households | 14,646 | 23,777 | 80,755,759 |
| Married couple, w/children | 31.7% | 33.1% | 30.5% |
| Married couple, no children | 51.4% | 49.9% | 42.9% |
| Non Family Households | 4,374 | 8,976 | 43,255,233 |
| Single householder, w/children | 9.6% | 10.2% | 15.8% |
| Single householder, no children | 7.3% | 6.8% | 10.8% |