| | Porter, IN | South Elgin, IL | United States |
| Population | 5,175 | 23,749 | 329,725,481 |
| Female Population | 52.3% | 48.7% | 50.5% |
| Male Population | 47.7% | 51.4% | 49.5% |
| Median Age | 43.8 | 38.6 | 38.4 |
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| Population - 2010 | 4,850 | 22,025 | 309,327,143 |
| Population - 2000 | 4,972 | 16,100 | 285,036,114 |
| Population - 1990 | 3,118 | 7,474 | 251,960,433 |
| Pop. 2000 to Now | -2.7% | 53.1% | 15.6% |
| Pop. 1990 to Now | 55.2% | 229.8% | 30.8% |
| space4 | | | |
| Population Density | 834.7 | 3,362.9 | 93.4 |
| Land Area | 6.2 | 7.1 | 3,531,905.4 |
| Water Area | 0.3 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Porter, IN | South Elgin, IL | United States |
| Age 0 to 4 | 4.1% | 4.0% | 5.9% |
| Age 5 to 9 | 7.3% | 6.8% | 6.1% |
| Age 10 to 14 | 4.4% | 6.6% | 6.6% |
| Age 15 to 17 | 3.2% | 6.1% | 3.9% |
| Age 18 to 20 | 3.9% | 5.5% | 4.0% |
| Age 21 to 24 | 2.1% | 5.0% | 5.2% |
| Age 25 to 34 | 16.2% | 9.5% | 13.8% |
| Age 35 to 44 | 11.0% | 15.5% | 12.9% |
| Age 45 to 54 | 15.4% | 18.9% | 12.6% |
| Age 55 to 59 | 8.7% | 7.2% | 6.7% |
| Age 60 to 64 | 6.3% | 4.3% | 6.3% |
| Age 65 to 74 | 13.2% | 6.2% | 9.6% |
| Age 75 to 84 | 3.7% | 3.0% | 4.5% |
| Age 85 and over | 0.5% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Porter, IN | South Elgin, IL | United States |
| White | 86.2% | 61.9% | 59.4% |
| Black | 0.0% | 5.0% | 12.2% |
| Asian | 1.6% | 8.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 2.3% | 2.5% | 3.2% |
| Hispanic | 9.9% | 22.1% | 18.4% |
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| Marriage & Family | | | |
| | Porter, IN | South Elgin, IL | United States |
| Married Population | 55.5% | 55.3% | 49.8% |
| Currently Married | 54.5% | 54.1% | 48.0% |
| Married but Separated | 1.0% | 1.2% | 1.8% |
| Single Population | 44.5% | 44.7% | 50.2% |
| Never Married | 32.3% | 31.8% | 33.8% |
| Divorced | 9.7% | 9.7% | 10.8% |
| Widowed | 2.5% | 3.2% | 5.6% |
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| Household Size | 2.63 | 2.93 | 2.60 |
| Households | 1,970 | 8,017 | 124,010,992 |
| Family Households | 1,508 | 6,172 | 80,755,759 |
| Married couple, w/children | 22.5% | 41.5% | 30.5% |
| Married couple, no children | 55.4% | 41.2% | 42.9% |
| Non Family Households | 462 | 1,845 | 43,255,233 |
| Single householder, w/children | 15.8% | 9.5% | 15.8% |
| Single householder, no children | 6.2% | 7.8% | 10.8% |