| | Avondale, PA | Downingtown, PA | United States |
| Population | 1,364 | 8,047 | 329,725,481 |
| Female Population | 44.9% | 57.4% | 50.5% |
| Male Population | 55.1% | 42.6% | 49.5% |
| Median Age | 30 | 39.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,273 | 7,891 | 309,327,143 |
| Population - 2000 | 1,108 | 7,589 | 285,036,114 |
| Population - 1990 | 954 | 7,749 | 251,960,433 |
| Pop. 2000 to Now | 25.8% | 10.9% | 15.6% |
| Pop. 1990 to Now | 46.1% | 8.7% | 30.8% |
| space4 | | | |
| Population Density | 2,818.2 | 3,677.8 | 93.4 |
| Land Area | 0.5 | 2.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Avondale, PA | Downingtown, PA | United States |
| Age 0 to 4 | 9.2% | 6.2% | 5.9% |
| Age 5 to 9 | 8.6% | 4.2% | 6.1% |
| Age 10 to 14 | 9.5% | 5.7% | 6.6% |
| Age 15 to 17 | 5.3% | 3.5% | 3.9% |
| Age 18 to 20 | 3.3% | 3.0% | 4.0% |
| Age 21 to 24 | 3.1% | 2.4% | 5.2% |
| Age 25 to 34 | 23.6% | 18.9% | 13.8% |
| Age 35 to 44 | 10.1% | 15.8% | 12.9% |
| Age 45 to 54 | 6.9% | 11.2% | 12.6% |
| Age 55 to 59 | 6.1% | 9.3% | 6.7% |
| Age 60 to 64 | 4.4% | 6.1% | 6.3% |
| Age 65 to 74 | 6.9% | 9.7% | 9.6% |
| Age 75 to 84 | 2.1% | 1.9% | 4.5% |
| Age 85 and over | 1.0% | 2.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Avondale, PA | Downingtown, PA | United States |
| White | 25.6% | 69.2% | 59.4% |
| Black | 4.0% | 12.0% | 12.2% |
| Asian | 3.8% | 6.3% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.8% | 3.6% | 3.2% |
| Hispanic | 65.8% | 8.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Avondale, PA | Downingtown, PA | United States |
| Married Population | 52.0% | 44.6% | 49.8% |
| Currently Married | 51.8% | 43.3% | 48.0% |
| Married but Separated | 0.2% | 1.3% | 1.8% |
| Single Population | 48.0% | 55.4% | 50.2% |
| Never Married | 36.0% | 32.2% | 33.8% |
| Divorced | 8.8% | 19.8% | 10.8% |
| Widowed | 3.2% | 3.4% | 5.6% |
| space5 | | | |
| Household Size | 3.18 | 2.24 | 2.60 |
| Households | 429 | 3,487 | 124,010,992 |
| Family Households | 293 | 2,247 | 80,755,759 |
| Married couple, w/children | 38.2% | 29.2% | 30.5% |
| Married couple, no children | 31.7% | 31.9% | 42.9% |
| Non Family Households | 136 | 1,240 | 43,255,233 |
| Single householder, w/children | 26.6% | 21.0% | 15.8% |
| Single householder, no children | 3.4% | 17.9% | 10.8% |