| | Kooskia, ID | Cochituate, MA | United States |
| Population | 596 | 6,966 | 329,725,481 |
| Female Population | 50.2% | 48.9% | 50.5% |
| Male Population | 49.8% | 51.1% | 49.5% |
| Median Age | 56.1 | 42.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 655 | 6,397 | 309,327,143 |
| Population - 2000 | 675 | 6,768 | 285,036,114 |
| Population - 1990 | 692 | 6,046 | 251,960,433 |
| Pop. 2000 to Now | 0.3% | 2.4% | 15.6% |
| Pop. 1990 to Now | -2.2% | 14.7% | 30.8% |
| space4 | | | |
| Population Density | 941.6 | 1,828.8 | 93.4 |
| Land Area | 0.6 | 3.8 | 3,531,905.4 |
| Water Area | 0.1 | 0.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Kooskia, ID | Cochituate, MA | United States |
| Age 0 to 4 | 5.0% | 4.7% | 5.9% |
| Age 5 to 9 | 5.9% | 7.3% | 6.1% |
| Age 10 to 14 | 3.4% | 9.4% | 6.6% |
| Age 15 to 17 | 7.7% | 4.3% | 3.9% |
| Age 18 to 20 | 0.7% | 3.0% | 4.0% |
| Age 21 to 24 | 1.8% | 4.3% | 5.2% |
| Age 25 to 34 | 8.7% | 8.3% | 13.8% |
| Age 35 to 44 | 6.2% | 12.8% | 12.9% |
| Age 45 to 54 | 4.7% | 13.8% | 12.6% |
| Age 55 to 59 | 12.6% | 8.4% | 6.7% |
| Age 60 to 64 | 7.6% | 8.1% | 6.3% |
| Age 65 to 74 | 27.9% | 8.6% | 9.6% |
| Age 75 to 84 | 6.9% | 5.5% | 4.5% |
| Age 85 and over | 1.0% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Kooskia, ID | Cochituate, MA | United States |
| White | 72.8% | 76.2% | 59.4% |
| Black | 0.3% | 0.5% | 12.2% |
| Asian | 1.5% | 12.6% | 5.6% |
| Native American | 21.3% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 0.7% | 3.6% | 3.2% |
| Hispanic | 3.4% | 6.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Kooskia, ID | Cochituate, MA | United States |
| Married Population | 52.1% | 65.5% | 49.8% |
| Currently Married | 48.7% | 65.2% | 48.0% |
| Married but Separated | 3.3% | 0.3% | 1.8% |
| Single Population | 47.9% | 34.5% | 50.2% |
| Never Married | 17.0% | 22.7% | 33.8% |
| Divorced | 16.8% | 6.8% | 10.8% |
| Widowed | 14.1% | 4.9% | 5.6% |
| space5 | | | |
| Household Size | 2.61 | 2.90 | 2.60 |
| Households | 228 | 2,387 | 124,010,992 |
| Family Households | 126 | 1,843 | 80,755,759 |
| Married couple, w/children | 23.0% | 50.8% | 30.5% |
| Married couple, no children | 50.0% | 41.3% | 42.9% |
| Non Family Households | 102 | 544 | 43,255,233 |
| Single householder, w/children | 20.6% | 4.0% | 15.8% |
| Single householder, no children | 6.3% | 3.9% | 10.8% |