| | St. Regis Park, KY | Morgan, UT | United States |
| Population | 1,524 | 4,105 | 329,725,481 |
| Female Population | 47.7% | 47.2% | 50.5% |
| Male Population | 52.3% | 52.8% | 49.5% |
| Median Age | 50 | 29.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,459 | 3,674 | 309,327,143 |
| Population - 2000 | 1,520 | 2,635 | 285,036,114 |
| Population - 1990 | 1,756 | 2,115 | 251,960,433 |
| Pop. 2000 to Now | -1.6% | 67.4% | 15.6% |
| Pop. 1990 to Now | -14.8% | 108.5% | 30.8% |
| space4 | | | |
| Population Density | 4,317.3 | 1,384.5 | 93.4 |
| Land Area | 0.4 | 3.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | St. Regis Park, KY | Morgan, UT | United States |
| Age 0 to 4 | 4.7% | 8.9% | 5.9% |
| Age 5 to 9 | 4.7% | 9.8% | 6.1% |
| Age 10 to 14 | 6.1% | 10.9% | 6.6% |
| Age 15 to 17 | 1.9% | 7.2% | 3.9% |
| Age 18 to 20 | 0.6% | 3.5% | 4.0% |
| Age 21 to 24 | 2.6% | 4.5% | 5.2% |
| Age 25 to 34 | 12.8% | 14.2% | 13.8% |
| Age 35 to 44 | 11.4% | 12.4% | 12.9% |
| Age 45 to 54 | 14.0% | 9.5% | 12.6% |
| Age 55 to 59 | 10.0% | 3.5% | 6.7% |
| Age 60 to 64 | 8.5% | 5.1% | 6.3% |
| Age 65 to 74 | 13.8% | 7.4% | 9.6% |
| Age 75 to 84 | 5.8% | 1.8% | 4.5% |
| Age 85 and over | 3.2% | 1.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | St. Regis Park, KY | Morgan, UT | United States |
| White | 96.5% | 92.9% | 59.4% |
| Black | 1.6% | 0.3% | 12.2% |
| Asian | 0.3% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.0% | 1.9% | 0.4% |
| Two or More Races | 0.7% | 0.4% | 3.2% |
| Hispanic | 1.0% | 4.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | St. Regis Park, KY | Morgan, UT | United States |
| Married Population | 52.3% | 70.9% | 49.8% |
| Currently Married | 51.8% | 70.5% | 48.0% |
| Married but Separated | 0.5% | 0.4% | 1.8% |
| Single Population | 47.7% | 29.1% | 50.2% |
| Never Married | 25.1% | 18.4% | 33.8% |
| Divorced | 16.1% | 7.5% | 10.8% |
| Widowed | 6.5% | 3.2% | 5.6% |
| space5 | | | |
| Household Size | 2.48 | 3.49 | 2.60 |
| Households | 615 | 1,176 | 124,010,992 |
| Family Households | 415 | 1,039 | 80,755,759 |
| Married couple, w/children | 30.1% | 56.0% | 30.5% |
| Married couple, no children | 51.8% | 37.0% | 42.9% |
| Non Family Households | 200 | 137 | 43,255,233 |
| Single householder, w/children | 1.9% | 4.9% | 15.8% |
| Single householder, no children | 16.1% | 2.1% | 10.8% |