| | Emery, UT | Castle Dale, UT | United States |
| Population | 375 | 1,375 | 329,725,481 |
| Female Population | 36.3% | 48.3% | 50.5% |
| Male Population | 63.7% | 51.7% | 49.5% |
| Median Age | 40.6 | 36.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 290 | 1,643 | 309,327,143 |
| Population - 2000 | 308 | 1,657 | 285,036,114 |
| Population - 1990 | 300 | 1,704 | 251,960,433 |
| Pop. 2000 to Now | -11.7% | -8.8% | 15.6% |
| Pop. 1990 to Now | -9.3% | -11.3% | 30.8% |
| space4 | | | |
| Population Density | 305.4 | 623.3 | 93.4 |
| Land Area | 1.2 | 2.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Emery, UT | Castle Dale, UT | United States |
| Age 0 to 4 | 1.6% | 5.3% | 5.9% |
| Age 5 to 9 | 5.1% | 17.0% | 6.1% |
| Age 10 to 14 | 13.3% | 7.3% | 6.6% |
| Age 15 to 17 | 16.5% | 4.2% | 3.9% |
| Age 18 to 20 | 2.9% | 1.3% | 4.0% |
| Age 21 to 24 | 1.3% | 1.7% | 5.2% |
| Age 25 to 34 | 2.9% | 10.0% | 13.8% |
| Age 35 to 44 | 16.5% | 13.6% | 12.9% |
| Age 45 to 54 | 16.5% | 5.7% | 12.6% |
| Age 55 to 59 | 4.8% | 5.0% | 6.7% |
| Age 60 to 64 | 3.2% | 6.1% | 6.3% |
| Age 65 to 74 | 10.1% | 13.4% | 9.6% |
| Age 75 to 84 | 2.9% | 8.4% | 4.5% |
| Age 85 and over | 2.1% | 1.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Emery, UT | Castle Dale, UT | United States |
| White | 90.4% | 96.7% | 59.4% |
| Black | 1.9% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.7% | 0.4% |
| Two or More Races | 7.7% | 0.0% | 3.2% |
| Hispanic | 0.0% | 2.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Emery, UT | Castle Dale, UT | United States |
| Married Population | 50.3% | 65.9% | 49.8% |
| Currently Married | 50.3% | 64.1% | 48.0% |
| Married but Separated | 0.0% | 1.9% | 1.8% |
| Single Population | 49.7% | 34.1% | 50.2% |
| Never Married | 29.0% | 16.2% | 33.8% |
| Divorced | 12.7% | 7.7% | 10.8% |
| Widowed | 8.0% | 10.1% | 5.6% |
| space5 | | | |
| Household Size | 3.07 | 2.80 | 2.60 |
| Households | 112 | 491 | 124,010,992 |
| Family Households | 80 | 349 | 80,755,759 |
| Married couple, w/children | 57.5% | 36.7% | 30.5% |
| Married couple, no children | 30.0% | 48.7% | 42.9% |
| Non Family Households | 32 | 142 | 43,255,233 |
| Single householder, w/children | 7.5% | 12.6% | 15.8% |
| Single householder, no children | 5.0% | 2.0% | 10.8% |