| | Challenge-Brownsville, CA | Lakeport, CA | United States |
| Population | 984 | 5,048 | 329,725,481 |
| Female Population | 64.5% | 53.9% | 50.5% |
| Male Population | 35.5% | 46.1% | 49.5% |
| Median Age | 54.9 | 52.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,321 | 4,753 | 309,327,143 |
| Population - 2000 | 1,069 | 4,820 | 285,036,114 |
| Population - 1990 | 1,096 | 4,390 | 251,960,433 |
| Pop. 2000 to Now | -15.3% | 3.0% | 15.6% |
| Pop. 1990 to Now | -17.3% | 13.1% | 30.8% |
| space4 | | | |
| Population Density | 101.4 | 1,650.8 | 93.4 |
| Land Area | 9.7 | 3.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Challenge-Brownsville, CA | Lakeport, CA | United States |
| Age 0 to 4 | 0.0% | 8.4% | 5.9% |
| Age 5 to 9 | 18.0% | 2.4% | 6.1% |
| Age 10 to 14 | 0.0% | 2.4% | 6.6% |
| Age 15 to 17 | 0.0% | 3.5% | 3.9% |
| Age 18 to 20 | 0.7% | 0.9% | 4.0% |
| Age 21 to 24 | 0.0% | 6.4% | 5.2% |
| Age 25 to 34 | 10.5% | 8.7% | 13.8% |
| Age 35 to 44 | 11.4% | 9.6% | 12.9% |
| Age 45 to 54 | 9.9% | 11.7% | 12.6% |
| Age 55 to 59 | 25.7% | 7.9% | 6.7% |
| Age 60 to 64 | 11.4% | 10.4% | 6.3% |
| Age 65 to 74 | 5.0% | 17.8% | 9.6% |
| Age 75 to 84 | 7.5% | 4.8% | 4.5% |
| Age 85 and over | 0.0% | 5.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Challenge-Brownsville, CA | Lakeport, CA | United States |
| White | 96.2% | 74.7% | 59.4% |
| Black | 0.7% | 0.9% | 12.2% |
| Asian | 0.0% | 4.8% | 5.6% |
| Native American | 0.0% | 1.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 3.5% | 3.2% |
| Hispanic | 3.0% | 14.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Challenge-Brownsville, CA | Lakeport, CA | United States |
| Married Population | 57.6% | 49.1% | 49.8% |
| Currently Married | 57.6% | 47.4% | 48.0% |
| Married but Separated | 0.0% | 1.7% | 1.8% |
| Single Population | 42.4% | 50.9% | 50.2% |
| Never Married | 31.2% | 28.8% | 33.8% |
| Divorced | 6.2% | 12.8% | 10.8% |
| Widowed | 5.0% | 9.3% | 5.6% |
| space5 | | | |
| Household Size | 2.03 | 2.29 | 2.60 |
| Households | 482 | 2,148 | 124,010,992 |
| Family Households | 321 | 1,325 | 80,755,759 |
| Married couple, w/children | 0.0% | 24.7% | 30.5% |
| Married couple, no children | 65.1% | 54.4% | 42.9% |
| Non Family Households | 161 | 823 | 43,255,233 |
| Single householder, w/children | 34.9% | 6.9% | 15.8% |
| Single householder, no children | 0.0% | 14.0% | 10.8% |