| | Erda, UT | Herriman, UT | United States |
| Population | 3,163 | 52,860 | 329,725,481 |
| Female Population | 48.8% | 50.8% | 50.5% |
| Male Population | 51.3% | 49.2% | 49.5% |
| Median Age | 27.5 | 28.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,445 | 22,517 | 309,327,143 |
| Population - 2000 | 2,473 | 1,523 | 285,036,114 |
| Population - 1990 | 1,113 | 1,070 | 251,960,433 |
| Pop. 2000 to Now | 6.2% | 3,560.9% | 15.6% |
| Pop. 1990 to Now | 135.9% | 5,110.8% | 30.8% |
| space4 | | | |
| Population Density | 167.4 | 2,450.3 | 93.4 |
| Land Area | 18.9 | 21.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Erda, UT | Herriman, UT | United States |
| Age 0 to 4 | 6.9% | 9.6% | 5.9% |
| Age 5 to 9 | 8.5% | 11.7% | 6.1% |
| Age 10 to 14 | 6.1% | 9.9% | 6.6% |
| Age 15 to 17 | 13.1% | 5.1% | 3.9% |
| Age 18 to 20 | 2.7% | 3.5% | 4.0% |
| Age 21 to 24 | 7.3% | 4.2% | 5.2% |
| Age 25 to 34 | 10.1% | 16.6% | 13.8% |
| Age 35 to 44 | 9.1% | 16.6% | 12.9% |
| Age 45 to 54 | 10.4% | 11.5% | 12.6% |
| Age 55 to 59 | 8.8% | 4.1% | 6.7% |
| Age 60 to 64 | 8.5% | 2.7% | 6.3% |
| Age 65 to 74 | 6.6% | 3.2% | 9.6% |
| Age 75 to 84 | 1.3% | 1.1% | 4.5% |
| Age 85 and over | 0.6% | 0.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Erda, UT | Herriman, UT | United States |
| White | 83.1% | 83.9% | 59.4% |
| Black | 4.5% | 0.6% | 12.2% |
| Asian | 0.0% | 2.2% | 5.6% |
| Native American | 0.5% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.4% | 0.7% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 8.1% | 4.1% | 3.2% |
| Hispanic | 3.4% | 8.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Erda, UT | Herriman, UT | United States |
| Married Population | 59.3% | 65.0% | 49.8% |
| Currently Married | 59.3% | 64.6% | 48.0% |
| Married but Separated | 0.0% | 0.4% | 1.8% |
| Single Population | 40.7% | 35.0% | 50.2% |
| Never Married | 33.1% | 25.7% | 33.8% |
| Divorced | 4.7% | 6.5% | 10.8% |
| Widowed | 2.9% | 2.8% | 5.6% |
| space5 | | | |
| Household Size | 3.85 | 3.51 | 2.60 |
| Households | 805 | 15,045 | 124,010,992 |
| Family Households | 747 | 12,357 | 80,755,759 |
| Married couple, w/children | 63.9% | 57.8% | 30.5% |
| Married couple, no children | 32.4% | 29.2% | 42.9% |
| Non Family Households | 58 | 2,688 | 43,255,233 |
| Single householder, w/children | 3.7% | 9.2% | 15.8% |
| Single householder, no children | 0.0% | 3.8% | 10.8% |