| | Richfield, ID | Burley, ID | United States |
| Population | 501 | 11,274 | 329,725,481 |
| Female Population | 44.7% | 50.0% | 50.5% |
| Male Population | 55.3% | 50.0% | 49.5% |
| Median Age | 37.6 | 30.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 476 | 10,331 | 309,327,143 |
| Population - 2000 | 412 | 9,316 | 285,036,114 |
| Population - 1990 | 383 | 8,702 | 251,960,433 |
| Pop. 2000 to Now | 19.2% | 15.0% | 15.6% |
| Pop. 1990 to Now | 28.2% | 23.1% | 30.8% |
| space4 | | | |
| Population Density | 763.7 | 1,845.2 | 93.4 |
| Land Area | 0.7 | 6.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Richfield, ID | Burley, ID | United States |
| Age 0 to 4 | 6.4% | 7.1% | 5.9% |
| Age 5 to 9 | 11.6% | 8.3% | 6.1% |
| Age 10 to 14 | 7.2% | 10.0% | 6.6% |
| Age 15 to 17 | 2.4% | 5.4% | 3.9% |
| Age 18 to 20 | 2.2% | 5.0% | 4.0% |
| Age 21 to 24 | 3.0% | 6.0% | 5.2% |
| Age 25 to 34 | 13.4% | 12.1% | 13.8% |
| Age 35 to 44 | 13.4% | 13.8% | 12.9% |
| Age 45 to 54 | 12.8% | 9.1% | 12.6% |
| Age 55 to 59 | 10.0% | 4.5% | 6.7% |
| Age 60 to 64 | 5.0% | 6.0% | 6.3% |
| Age 65 to 74 | 7.8% | 7.4% | 9.6% |
| Age 75 to 84 | 5.0% | 3.9% | 4.5% |
| Age 85 and over | 0.0% | 1.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Richfield, ID | Burley, ID | United States |
| White | 80.0% | 60.3% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.4% | 0.4% | 5.6% |
| Native American | 1.6% | 0.9% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.6% | 0.4% |
| Two or More Races | 7.6% | 4.0% | 3.2% |
| Hispanic | 10.4% | 33.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Richfield, ID | Burley, ID | United States |
| Married Population | 50.1% | 53.9% | 49.8% |
| Currently Married | 48.0% | 52.3% | 48.0% |
| Married but Separated | 2.1% | 1.6% | 1.8% |
| Single Population | 49.9% | 46.1% | 50.2% |
| Never Married | 22.1% | 29.5% | 33.8% |
| Divorced | 21.1% | 11.6% | 10.8% |
| Widowed | 6.7% | 5.1% | 5.6% |
| space5 | | | |
| Household Size | 2.62 | 2.86 | 2.60 |
| Households | 191 | 3,850 | 124,010,992 |
| Family Households | 130 | 2,720 | 80,755,759 |
| Married couple, w/children | 26.2% | 33.1% | 30.5% |
| Married couple, no children | 37.7% | 41.0% | 42.9% |
| Non Family Households | 61 | 1,130 | 43,255,233 |
| Single householder, w/children | 23.1% | 20.0% | 15.8% |
| Single householder, no children | 13.1% | 5.9% | 10.8% |