| | Plain City, UT | Hooper, UT | United States |
| Population | 7,662 | 8,941 | 329,725,481 |
| Female Population | 54.2% | 49.3% | 50.5% |
| Male Population | 45.8% | 50.7% | 49.5% |
| Median Age | 33.6 | 37.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 5,518 | 7,244 | 309,327,143 |
| Population - 2000 | 3,489 | 3,926 | 285,036,114 |
| Population - 1990 | 2,722 | 3,468 | 251,960,433 |
| Pop. 2000 to Now | 125.3% | 134.2% | 15.6% |
| Pop. 1990 to Now | 188.8% | 165.2% | 30.8% |
| space4 | | | |
| Population Density | 641.8 | 341.9 | 93.4 |
| Land Area | 11.9 | 26.1 | 3,531,905.4 |
| Water Area | 0.2 | 61.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Plain City, UT | Hooper, UT | United States |
| Age 0 to 4 | 9.3% | 5.8% | 5.9% |
| Age 5 to 9 | 9.7% | 6.8% | 6.1% |
| Age 10 to 14 | 10.6% | 12.7% | 6.6% |
| Age 15 to 17 | 6.5% | 7.2% | 3.9% |
| Age 18 to 20 | 3.1% | 5.8% | 4.0% |
| Age 21 to 24 | 2.8% | 3.2% | 5.2% |
| Age 25 to 34 | 9.4% | 5.8% | 13.8% |
| Age 35 to 44 | 16.4% | 19.9% | 12.9% |
| Age 45 to 54 | 12.7% | 16.0% | 12.6% |
| Age 55 to 59 | 5.7% | 5.1% | 6.7% |
| Age 60 to 64 | 4.3% | 3.2% | 6.3% |
| Age 65 to 74 | 4.8% | 4.8% | 9.6% |
| Age 75 to 84 | 3.1% | 3.4% | 4.5% |
| Age 85 and over | 1.6% | 0.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Plain City, UT | Hooper, UT | United States |
| White | 93.0% | 90.8% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.2% | 0.2% | 5.6% |
| Native American | 0.8% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 1.0% | 0.2% |
| Other | 0.5% | 0.0% | 0.4% |
| Two or More Races | 3.2% | 1.1% | 3.2% |
| Hispanic | 2.3% | 7.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Plain City, UT | Hooper, UT | United States |
| Married Population | 67.7% | 64.2% | 49.8% |
| Currently Married | 67.0% | 64.2% | 48.0% |
| Married but Separated | 0.7% | 0.0% | 1.8% |
| Single Population | 32.3% | 35.8% | 50.2% |
| Never Married | 20.7% | 29.0% | 33.8% |
| Divorced | 6.8% | 4.7% | 10.8% |
| Widowed | 4.8% | 2.1% | 5.6% |
| space5 | | | |
| Household Size | 3.38 | 3.46 | 2.60 |
| Households | 2,268 | 2,582 | 124,010,992 |
| Family Households | 1,966 | 2,166 | 80,755,759 |
| Married couple, w/children | 49.6% | 56.0% | 30.5% |
| Married couple, no children | 41.2% | 39.3% | 42.9% |
| Non Family Households | 302 | 416 | 43,255,233 |
| Single householder, w/children | 6.0% | 2.1% | 15.8% |
| Single householder, no children | 3.3% | 2.5% | 10.8% |