| | Gifford, IL | Penfield, IL | United States |
| Population | 828 | 242 | 329,725,481 |
| Female Population | 52.3% | 47.9% | 50.5% |
| Male Population | 47.7% | 52.1% | 49.5% |
| Median Age | 49.9 | 52.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 979 | 103 | 309,327,143 |
| Population - 2000 | 815 | 162 | 285,036,114 |
| Population - 1990 | 845 | 177 | 251,960,433 |
| Pop. 2000 to Now | 27.0% | -11.7% | 15.6% |
| Pop. 1990 to Now | 22.5% | -19.2% | 30.8% |
| space4 | | | |
| Population Density | 1,873.3 | 941.6 | 93.4 |
| Land Area | 0.4 | 0.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Gifford, IL | Penfield, IL | United States |
| Age 0 to 4 | 6.0% | 0.0% | 5.9% |
| Age 5 to 9 | 5.0% | 0.0% | 6.1% |
| Age 10 to 14 | 5.8% | 19.0% | 6.6% |
| Age 15 to 17 | 2.5% | 1.7% | 3.9% |
| Age 18 to 20 | 1.6% | 1.2% | 4.0% |
| Age 21 to 24 | 2.4% | 0.0% | 5.2% |
| Age 25 to 34 | 9.8% | 13.2% | 13.8% |
| Age 35 to 44 | 8.3% | 7.0% | 12.9% |
| Age 45 to 54 | 19.4% | 14.9% | 12.6% |
| Age 55 to 59 | 4.8% | 4.5% | 6.7% |
| Age 60 to 64 | 5.0% | 3.7% | 6.3% |
| Age 65 to 74 | 10.4% | 29.3% | 9.6% |
| Age 75 to 84 | 8.7% | 2.9% | 4.5% |
| Age 85 and over | 10.3% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Gifford, IL | Penfield, IL | United States |
| White | 92.0% | 92.1% | 59.4% |
| Black | 1.8% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 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 | 5.9% | 2.9% | 3.2% |
| Hispanic | 0.2% | 5.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Gifford, IL | Penfield, IL | United States |
| Married Population | 53.1% | 39.8% | 49.8% |
| Currently Married | 52.8% | 39.8% | 48.0% |
| Married but Separated | 0.3% | 0.0% | 1.8% |
| Single Population | 46.9% | 60.2% | 50.2% |
| Never Married | 21.2% | 20.4% | 33.8% |
| Divorced | 12.5% | 30.6% | 10.8% |
| Widowed | 13.2% | 9.2% | 5.6% |
| space5 | | | |
| Household Size | 2.17 | 2.69 | 2.60 |
| Households | 345 | 90 | 124,010,992 |
| Family Households | 204 | 56 | 80,755,759 |
| Married couple, w/children | 30.4% | 7.1% | 30.5% |
| Married couple, no children | 55.4% | 66.1% | 42.9% |
| Non Family Households | 141 | 34 | 43,255,233 |
| Single householder, w/children | 9.8% | 5.4% | 15.8% |
| Single householder, no children | 4.4% | 21.4% | 10.8% |