| | Amalga, UT | St. Pete Beach, FL | United States |
| Population | 512 | 8,963 | 329,725,481 |
| Female Population | 50.2% | 46.3% | 50.5% |
| Male Population | 49.8% | 53.7% | 49.5% |
| Median Age | 33.7 | 61.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 495 | 9,334 | 309,327,143 |
| Population - 2000 | 427 | 9,929 | 285,036,114 |
| Population - 1990 | 366 | 9,514 | 251,960,433 |
| Pop. 2000 to Now | 35.1% | -4.0% | 15.6% |
| Pop. 1990 to Now | 57.7% | 0.2% | 30.8% |
| space4 | | | |
| Population Density | 146.9 | 4,215.9 | 93.4 |
| Land Area | 3.5 | 2.1 | 3,531,905.4 |
| Water Area | 0.1 | 4.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Amalga, UT | St. Pete Beach, FL | United States |
| Age 0 to 4 | 9.4% | 0.8% | 5.9% |
| Age 5 to 9 | 10.9% | 0.5% | 6.1% |
| Age 10 to 14 | 6.6% | 3.6% | 6.6% |
| Age 15 to 17 | 6.6% | 1.7% | 3.9% |
| Age 18 to 20 | 1.6% | 3.0% | 4.0% |
| Age 21 to 24 | 6.4% | 1.9% | 5.2% |
| Age 25 to 34 | 11.5% | 5.2% | 13.8% |
| Age 35 to 44 | 13.3% | 4.3% | 12.9% |
| Age 45 to 54 | 10.0% | 16.1% | 12.6% |
| Age 55 to 59 | 5.5% | 8.9% | 6.7% |
| Age 60 to 64 | 7.8% | 15.3% | 6.3% |
| Age 65 to 74 | 6.8% | 17.0% | 9.6% |
| Age 75 to 84 | 3.1% | 12.8% | 4.5% |
| Age 85 and over | 0.4% | 8.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Amalga, UT | St. Pete Beach, FL | United States |
| White | 91.2% | 91.5% | 59.4% |
| Black | 0.0% | 0.3% | 12.2% |
| Asian | 0.0% | 1.6% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.8% | 0.2% | 0.4% |
| Two or More Races | 1.4% | 2.4% | 3.2% |
| Hispanic | 6.6% | 3.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Amalga, UT | St. Pete Beach, FL | United States |
| Married Population | 69.5% | 59.5% | 49.8% |
| Currently Married | 69.3% | 58.8% | 48.0% |
| Married but Separated | 0.3% | 0.7% | 1.8% |
| Single Population | 30.5% | 40.5% | 50.2% |
| Never Married | 24.1% | 17.1% | 33.8% |
| Divorced | 4.0% | 16.6% | 10.8% |
| Widowed | 2.4% | 6.8% | 5.6% |
| space5 | | | |
| Household Size | 3.46 | 1.93 | 2.60 |
| Households | 148 | 4,630 | 124,010,992 |
| Family Households | 131 | 2,751 | 80,755,759 |
| Married couple, w/children | 47.3% | 11.5% | 30.5% |
| Married couple, no children | 45.8% | 79.3% | 42.9% |
| Non Family Households | 17 | 1,879 | 43,255,233 |
| Single householder, w/children | 3.8% | 2.4% | 15.8% |
| Single householder, no children | 3.1% | 6.8% | 10.8% |