| | Richfield, MN | Gustavus, AK | United States |
| Population | 36,899 | 583 | 329,725,481 |
| Female Population | 49.0% | 52.3% | 50.5% |
| Male Population | 51.0% | 47.7% | 49.5% |
| Median Age | 37.3 | 51 | 38.4 |
| space3 | | | |
| Population - 2010 | 35,263 | 444 | 309,327,143 |
| Population - 2000 | 34,439 | 429 | 285,036,114 |
| Population - 1990 | 35,710 | 258 | 251,960,433 |
| Pop. 2000 to Now | 5.2% | 3.7% | 15.6% |
| Pop. 1990 to Now | 1.5% | 72.5% | 30.8% |
| space4 | | | |
| Population Density | 5,490.1 | 16.0 | 93.4 |
| Land Area | 6.7 | 36.4 | 3,531,905.4 |
| Water Area | 0.1 | 20.6 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Richfield, MN | Gustavus, AK | United States |
| Age 0 to 4 | 5.6% | 0.2% | 5.9% |
| Age 5 to 9 | 5.7% | 1.2% | 6.1% |
| Age 10 to 14 | 4.9% | 8.6% | 6.6% |
| Age 15 to 17 | 3.4% | 3.6% | 3.9% |
| Age 18 to 20 | 2.4% | 2.9% | 4.0% |
| Age 21 to 24 | 4.8% | 1.2% | 5.2% |
| Age 25 to 34 | 19.4% | 19.6% | 13.8% |
| Age 35 to 44 | 14.5% | 0.7% | 12.9% |
| Age 45 to 54 | 10.8% | 20.6% | 12.6% |
| Age 55 to 59 | 6.1% | 14.8% | 6.7% |
| Age 60 to 64 | 5.8% | 6.3% | 6.3% |
| Age 65 to 74 | 9.8% | 12.2% | 9.6% |
| Age 75 to 84 | 4.0% | 8.2% | 4.5% |
| Age 85 and over | 2.7% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Richfield, MN | Gustavus, AK | United States |
| White | 59.3% | 87.7% | 59.4% |
| Black | 11.3% | 0.0% | 12.2% |
| Asian | 5.5% | 0.0% | 5.6% |
| Native American | 0.2% | 3.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.6% | 0.0% | 0.4% |
| Two or More Races | 3.6% | 3.8% | 3.2% |
| Hispanic | 19.4% | 5.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Richfield, MN | Gustavus, AK | United States |
| Married Population | 49.4% | 57.1% | 49.8% |
| Currently Married | 48.8% | 56.6% | 48.0% |
| Married but Separated | 0.6% | 0.6% | 1.8% |
| Single Population | 50.6% | 42.9% | 50.2% |
| Never Married | 36.4% | 32.6% | 33.8% |
| Divorced | 9.6% | 5.3% | 10.8% |
| Widowed | 4.6% | 5.0% | 5.6% |
| space5 | | | |
| Household Size | 2.34 | 2.99 | 2.60 |
| Households | 15,648 | 188 | 124,010,992 |
| Family Households | 9,133 | 99 | 80,755,759 |
| Married couple, w/children | 26.9% | 18.2% | 30.5% |
| Married couple, no children | 50.0% | 74.7% | 42.9% |
| Non Family Households | 6,515 | 89 | 43,255,233 |
| Single householder, w/children | 12.8% | 7.1% | 15.8% |
| Single householder, no children | 10.4% | 0.0% | 10.8% |