| | Sigurd, UT | Ephraim, UT | United States |
| Population | 422 | 5,671 | 329,725,481 |
| Female Population | 42.9% | 53.1% | 50.5% |
| Male Population | 57.1% | 46.9% | 49.5% |
| Median Age | 36.3 | 22 | 38.4 |
| space3 | | | |
| Population - 2010 | 427 | 6,153 | 309,327,143 |
| Population - 2000 | 430 | 4,505 | 285,036,114 |
| Population - 1990 | 385 | 3,363 | 251,960,433 |
| Pop. 2000 to Now | 4.0% | 63.9% | 15.6% |
| Pop. 1990 to Now | 16.1% | 119.6% | 30.8% |
| space4 | | | |
| Population Density | 430.6 | 1,296.8 | 93.4 |
| Land Area | 1.0 | 4.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sigurd, UT | Ephraim, UT | United States |
| Age 0 to 4 | 9.7% | 8.7% | 5.9% |
| Age 5 to 9 | 5.7% | 5.4% | 6.1% |
| Age 10 to 14 | 5.7% | 5.4% | 6.6% |
| Age 15 to 17 | 9.2% | 5.8% | 3.9% |
| Age 18 to 20 | 1.7% | 17.9% | 4.0% |
| Age 21 to 24 | 9.2% | 13.5% | 5.2% |
| Age 25 to 34 | 5.7% | 12.9% | 13.8% |
| Age 35 to 44 | 14.5% | 8.4% | 12.9% |
| Age 45 to 54 | 16.8% | 6.7% | 12.6% |
| Age 55 to 59 | 5.9% | 1.7% | 6.7% |
| Age 60 to 64 | 4.3% | 2.5% | 6.3% |
| Age 65 to 74 | 5.0% | 6.6% | 9.6% |
| Age 75 to 84 | 6.4% | 3.4% | 4.5% |
| Age 85 and over | 0.2% | 1.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sigurd, UT | Ephraim, UT | United States |
| White | 93.8% | 88.3% | 59.4% |
| Black | 0.0% | 1.2% | 12.2% |
| Asian | 1.9% | 1.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.8% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 1.4% | 0.4% | 3.2% |
| Hispanic | 2.8% | 7.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sigurd, UT | Ephraim, UT | United States |
| Married Population | 67.6% | 47.4% | 49.8% |
| Currently Married | 65.5% | 45.7% | 48.0% |
| Married but Separated | 2.1% | 1.7% | 1.8% |
| Single Population | 32.4% | 52.6% | 50.2% |
| Never Married | 22.8% | 46.7% | 33.8% |
| Divorced | 6.0% | 1.5% | 10.8% |
| Widowed | 3.6% | 4.4% | 5.6% |
| space5 | | | |
| Household Size | 3.22 | 3.17 | 2.60 |
| Households | 131 | 1,709 | 124,010,992 |
| Family Households | 108 | 1,038 | 80,755,759 |
| Married couple, w/children | 54.6% | 51.3% | 30.5% |
| Married couple, no children | 38.0% | 37.9% | 42.9% |
| Non Family Households | 23 | 671 | 43,255,233 |
| Single householder, w/children | 0.0% | 6.9% | 15.8% |
| Single householder, no children | 7.4% | 4.0% | 10.8% |