| | Declo, ID | Lakewood, CA | United States |
| Population | 429 | 82,419 | 329,725,481 |
| Female Population | 52.5% | 51.3% | 50.5% |
| Male Population | 47.6% | 48.7% | 49.5% |
| Median Age | 41.3 | 38.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 346 | 80,070 | 309,327,143 |
| Population - 2000 | 338 | 79,345 | 285,036,114 |
| Population - 1990 | 279 | 73,557 | 251,960,433 |
| Pop. 2000 to Now | 9.2% | -1.6% | 15.6% |
| Pop. 1990 to Now | 32.3% | 6.2% | 30.8% |
| space4 | | | |
| Population Density | 1,548.7 | 8,756.8 | 93.4 |
| Land Area | 0.3 | 9.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Declo, ID | Lakewood, CA | United States |
| Age 0 to 4 | 2.6% | 6.0% | 5.9% |
| Age 5 to 9 | 2.8% | 5.6% | 6.1% |
| Age 10 to 14 | 17.9% | 6.1% | 6.6% |
| Age 15 to 17 | 11.2% | 3.3% | 3.9% |
| Age 18 to 20 | 1.6% | 3.5% | 4.0% |
| Age 21 to 24 | 2.1% | 4.7% | 5.2% |
| Age 25 to 34 | 3.7% | 15.0% | 13.8% |
| Age 35 to 44 | 11.2% | 14.6% | 12.9% |
| Age 45 to 54 | 17.9% | 13.2% | 12.6% |
| Age 55 to 59 | 1.2% | 7.5% | 6.7% |
| Age 60 to 64 | 17.7% | 6.5% | 6.3% |
| Age 65 to 74 | 7.7% | 8.1% | 9.6% |
| Age 75 to 84 | 1.6% | 3.8% | 4.5% |
| Age 85 and over | 0.7% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Declo, ID | Lakewood, CA | United States |
| White | 86.0% | 34.1% | 59.4% |
| Black | 0.7% | 8.1% | 12.2% |
| Asian | 0.0% | 17.8% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.7% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 0.5% | 4.5% | 3.2% |
| Hispanic | 12.8% | 34.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Declo, ID | Lakewood, CA | United States |
| Married Population | 44.1% | 51.7% | 49.8% |
| Currently Married | 42.2% | 50.3% | 48.0% |
| Married but Separated | 1.8% | 1.4% | 1.8% |
| Single Population | 55.9% | 48.3% | 50.2% |
| Never Married | 24.9% | 33.8% | 33.8% |
| Divorced | 26.4% | 9.7% | 10.8% |
| Widowed | 4.6% | 4.8% | 5.6% |
| space5 | | | |
| Household Size | 2.33 | 3.09 | 2.60 |
| Households | 184 | 26,664 | 124,010,992 |
| Family Households | 97 | 20,443 | 80,755,759 |
| Married couple, w/children | 42.3% | 32.8% | 30.5% |
| Married couple, no children | 28.9% | 40.1% | 42.9% |
| Non Family Households | 87 | 6,221 | 43,255,233 |
| Single householder, w/children | 13.4% | 12.6% | 15.8% |
| Single householder, no children | 15.5% | 14.5% | 10.8% |