| | Tremonton, UT | Erda, UT | United States |
| Population | 9,727 | 3,163 | 329,725,481 |
| Female Population | 44.5% | 48.8% | 50.5% |
| Male Population | 55.5% | 51.3% | 49.5% |
| Median Age | 31.5 | 27.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 7,714 | 4,445 | 309,327,143 |
| Population - 2000 | 5,592 | 2,473 | 285,036,114 |
| Population - 1990 | 4,264 | 1,113 | 251,960,433 |
| Pop. 2000 to Now | 69.2% | 6.2% | 15.6% |
| Pop. 1990 to Now | 121.9% | 135.9% | 30.8% |
| space4 | | | |
| Population Density | 1,215.4 | 167.4 | 93.4 |
| Land Area | 8.0 | 18.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Tremonton, UT | Erda, UT | United States |
| Age 0 to 4 | 8.1% | 6.9% | 5.9% |
| Age 5 to 9 | 7.2% | 8.5% | 6.1% |
| Age 10 to 14 | 14.2% | 6.1% | 6.6% |
| Age 15 to 17 | 4.2% | 13.1% | 3.9% |
| Age 18 to 20 | 4.7% | 2.7% | 4.0% |
| Age 21 to 24 | 5.8% | 7.3% | 5.2% |
| Age 25 to 34 | 11.1% | 10.1% | 13.8% |
| Age 35 to 44 | 17.0% | 9.1% | 12.9% |
| Age 45 to 54 | 8.5% | 10.4% | 12.6% |
| Age 55 to 59 | 4.8% | 8.8% | 6.7% |
| Age 60 to 64 | 2.9% | 8.5% | 6.3% |
| Age 65 to 74 | 6.3% | 6.6% | 9.6% |
| Age 75 to 84 | 4.1% | 1.3% | 4.5% |
| Age 85 and over | 1.3% | 0.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Tremonton, UT | Erda, UT | United States |
| White | 85.5% | 83.1% | 59.4% |
| Black | 1.1% | 4.5% | 12.2% |
| Asian | 0.8% | 0.0% | 5.6% |
| Native American | 0.0% | 0.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.4% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.1% | 8.1% | 3.2% |
| Hispanic | 11.5% | 3.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Tremonton, UT | Erda, UT | United States |
| Married Population | 60.1% | 59.3% | 49.8% |
| Currently Married | 59.7% | 59.3% | 48.0% |
| Married but Separated | 0.4% | 0.0% | 1.8% |
| Single Population | 39.9% | 40.7% | 50.2% |
| Never Married | 26.4% | 33.1% | 33.8% |
| Divorced | 7.2% | 4.7% | 10.8% |
| Widowed | 6.3% | 2.9% | 5.6% |
| space5 | | | |
| Household Size | 2.93 | 3.85 | 2.60 |
| Households | 3,310 | 805 | 124,010,992 |
| Family Households | 2,404 | 747 | 80,755,759 |
| Married couple, w/children | 48.4% | 63.9% | 30.5% |
| Married couple, no children | 33.2% | 32.4% | 42.9% |
| Non Family Households | 906 | 58 | 43,255,233 |
| Single householder, w/children | 13.0% | 3.7% | 15.8% |
| Single householder, no children | 5.4% | 0.0% | 10.8% |