| | Big Piney, WY | Grace, ID | United States |
| Population | 400 | 1,356 | 329,725,481 |
| Female Population | 40.8% | 45.7% | 50.5% |
| Male Population | 59.3% | 54.3% | 49.5% |
| Median Age | 45.3 | 37.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 560 | 921 | 309,327,143 |
| Population - 2000 | 408 | 990 | 285,036,114 |
| Population - 1990 | 454 | 973 | 251,960,433 |
| Pop. 2000 to Now | 26.5% | -4.9% | 15.6% |
| Pop. 1990 to Now | 13.7% | -3.2% | 30.8% |
| space4 | | | |
| Population Density | 787.4 | 1,415.5 | 93.4 |
| Land Area | 0.5 | 1.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Big Piney, WY | Grace, ID | United States |
| Age 0 to 4 | 4.0% | 5.8% | 5.9% |
| Age 5 to 9 | 8.0% | 5.8% | 6.1% |
| Age 10 to 14 | 8.8% | 6.6% | 6.6% |
| Age 15 to 17 | 0.8% | 12.2% | 3.9% |
| Age 18 to 20 | 0.0% | 3.8% | 4.0% |
| Age 21 to 24 | 5.3% | 3.0% | 5.2% |
| Age 25 to 34 | 6.3% | 7.9% | 13.8% |
| Age 35 to 44 | 12.5% | 13.9% | 12.9% |
| Age 45 to 54 | 29.5% | 19.3% | 12.6% |
| Age 55 to 59 | 4.8% | 3.4% | 6.7% |
| Age 60 to 64 | 2.5% | 5.5% | 6.3% |
| Age 65 to 74 | 6.0% | 9.7% | 9.6% |
| Age 75 to 84 | 5.3% | 2.9% | 4.5% |
| Age 85 and over | 6.5% | 0.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Big Piney, WY | Grace, ID | United States |
| White | 92.0% | 79.1% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.3% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.3% | 2.1% | 3.2% |
| Hispanic | 3.8% | 18.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Big Piney, WY | Grace, ID | United States |
| Married Population | 29.0% | 63.3% | 49.8% |
| Currently Married | 29.0% | 63.3% | 48.0% |
| Married but Separated | 0.0% | 0.0% | 1.8% |
| Single Population | 71.0% | 36.7% | 50.2% |
| Never Married | 22.4% | 25.0% | 33.8% |
| Divorced | 36.9% | 7.9% | 10.8% |
| Widowed | 11.7% | 3.8% | 5.6% |
| space5 | | | |
| Household Size | 2.70 | 3.14 | 2.60 |
| Households | 148 | 432 | 124,010,992 |
| Family Households | 60 | 338 | 80,755,759 |
| Married couple, w/children | 36.7% | 45.0% | 30.5% |
| Married couple, no children | 36.7% | 48.8% | 42.9% |
| Non Family Households | 88 | 94 | 43,255,233 |
| Single householder, w/children | 15.0% | 5.6% | 15.8% |
| Single householder, no children | 11.7% | 0.6% | 10.8% |