| | Falls City, OR | Vernonia, OR | United States |
| Population | 1,678 | 2,270 | 329,725,481 |
| Female Population | 46.1% | 45.6% | 50.5% |
| Male Population | 53.9% | 54.4% | 49.5% |
| Median Age | 33.8 | 39.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 955 | 2,165 | 309,327,143 |
| Population - 2000 | 966 | 2,228 | 285,036,114 |
| Population - 1990 | 818 | 1,808 | 251,960,433 |
| Pop. 2000 to Now | 10.8% | 3.0% | 15.6% |
| Pop. 1990 to Now | 30.8% | 26.9% | 30.8% |
| space4 | | | |
| Population Density | 1,396.0 | 1,379.1 | 93.4 |
| Land Area | 1.2 | 1.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Falls City, OR | Vernonia, OR | United States |
| Age 0 to 4 | 5.4% | 2.3% | 5.9% |
| Age 5 to 9 | 4.5% | 7.6% | 6.1% |
| Age 10 to 14 | 10.3% | 7.4% | 6.6% |
| Age 15 to 17 | 3.6% | 5.5% | 3.9% |
| Age 18 to 20 | 3.0% | 3.3% | 4.0% |
| Age 21 to 24 | 6.0% | 2.7% | 5.2% |
| Age 25 to 34 | 19.4% | 12.3% | 13.8% |
| Age 35 to 44 | 10.4% | 15.8% | 12.9% |
| Age 45 to 54 | 10.1% | 15.9% | 12.6% |
| Age 55 to 59 | 6.3% | 7.4% | 6.7% |
| Age 60 to 64 | 8.5% | 7.2% | 6.3% |
| Age 65 to 74 | 9.3% | 8.7% | 9.6% |
| Age 75 to 84 | 2.3% | 3.7% | 4.5% |
| Age 85 and over | 1.0% | 0.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Falls City, OR | Vernonia, OR | United States |
| White | 72.0% | 92.2% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 5.5% | 0.0% | 5.6% |
| Native American | 1.5% | 1.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 5.1% | 1.1% | 3.2% |
| Hispanic | 16.0% | 4.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Falls City, OR | Vernonia, OR | United States |
| Married Population | 47.5% | 58.5% | 49.8% |
| Currently Married | 45.7% | 56.8% | 48.0% |
| Married but Separated | 1.7% | 1.7% | 1.8% |
| Single Population | 52.5% | 41.5% | 50.2% |
| Never Married | 29.7% | 26.3% | 33.8% |
| Divorced | 16.7% | 11.0% | 10.8% |
| Widowed | 6.1% | 4.3% | 5.6% |
| space5 | | | |
| Household Size | 2.98 | 2.73 | 2.60 |
| Households | 563 | 830 | 124,010,992 |
| Family Households | 399 | 622 | 80,755,759 |
| Married couple, w/children | 29.8% | 26.5% | 30.5% |
| Married couple, no children | 31.6% | 54.2% | 42.9% |
| Non Family Households | 164 | 208 | 43,255,233 |
| Single householder, w/children | 18.5% | 8.8% | 15.8% |
| Single householder, no children | 20.1% | 10.5% | 10.8% |