| | Shelley, ID | Woodruff, UT | United States |
| Population | 4,784 | 320 | 329,725,481 |
| Female Population | 50.0% | 39.4% | 50.5% |
| Male Population | 50.0% | 60.6% | 49.5% |
| Median Age | 29.8 | 49 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,441 | 193 | 309,327,143 |
| Population - 2000 | 3,813 | 194 | 285,036,114 |
| Population - 1990 | 3,536 | 135 | 251,960,433 |
| Pop. 2000 to Now | 22.0% | 8.3% | 15.6% |
| Pop. 1990 to Now | 31.6% | 55.6% | 30.8% |
| space4 | | | |
| Population Density | 2,666.7 | 443.2 | 93.4 |
| Land Area | 1.8 | 0.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Shelley, ID | Woodruff, UT | United States |
| Age 0 to 4 | 10.2% | 3.1% | 5.9% |
| Age 5 to 9 | 6.8% | 11.6% | 6.1% |
| Age 10 to 14 | 9.4% | 8.1% | 6.6% |
| Age 15 to 17 | 4.4% | 6.9% | 3.9% |
| Age 18 to 20 | 4.9% | 0.0% | 4.0% |
| Age 21 to 24 | 6.4% | 0.0% | 5.2% |
| Age 25 to 34 | 15.1% | 12.8% | 13.8% |
| Age 35 to 44 | 11.6% | 6.9% | 12.9% |
| Age 45 to 54 | 13.1% | 18.8% | 12.6% |
| Age 55 to 59 | 3.7% | 0.9% | 6.7% |
| Age 60 to 64 | 4.0% | 5.0% | 6.3% |
| Age 65 to 74 | 6.1% | 20.9% | 9.6% |
| Age 75 to 84 | 1.7% | 1.6% | 4.5% |
| Age 85 and over | 2.6% | 3.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Shelley, ID | Woodruff, UT | United States |
| White | 83.5% | 94.1% | 59.4% |
| Black | 0.0% | 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% | 0.0% | 0.4% |
| Two or More Races | 6.1% | 0.0% | 3.2% |
| Hispanic | 10.4% | 5.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Shelley, ID | Woodruff, UT | United States |
| Married Population | 62.2% | 61.5% | 49.8% |
| Currently Married | 61.0% | 61.5% | 48.0% |
| Married but Separated | 1.2% | 0.0% | 1.8% |
| Single Population | 37.8% | 38.5% | 50.2% |
| Never Married | 23.4% | 16.6% | 33.8% |
| Divorced | 7.1% | 19.0% | 10.8% |
| Widowed | 7.3% | 2.8% | 5.6% |
| space5 | | | |
| Household Size | 3.07 | 3.02 | 2.60 |
| Households | 1,558 | 106 | 124,010,992 |
| Family Households | 1,203 | 92 | 80,755,759 |
| Married couple, w/children | 43.6% | 50.0% | 30.5% |
| Married couple, no children | 33.1% | 38.0% | 42.9% |
| Non Family Households | 355 | 14 | 43,255,233 |
| Single householder, w/children | 18.0% | 4.3% | 15.8% |
| Single householder, no children | 5.2% | 7.6% | 10.8% |