| | Port Byron, IL | Coal Valley, IL | United States |
| Population | 1,999 | 3,835 | 329,725,481 |
| Female Population | 48.9% | 48.4% | 50.5% |
| Male Population | 51.1% | 51.6% | 49.5% |
| Median Age | 40.3 | 48.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,645 | 3,742 | 309,327,143 |
| Population - 2000 | 1,535 | 3,606 | 285,036,114 |
| Population - 1990 | 1,002 | 2,683 | 251,960,433 |
| Pop. 2000 to Now | 4.0% | 3.1% | 15.6% |
| Pop. 1990 to Now | 59.4% | 38.6% | 30.8% |
| space4 | | | |
| Population Density | 806.7 | 1,229.6 | 93.4 |
| Land Area | 2.5 | 3.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Port Byron, IL | Coal Valley, IL | United States |
| Age 0 to 4 | 5.7% | 2.6% | 5.9% |
| Age 5 to 9 | 7.4% | 5.4% | 6.1% |
| Age 10 to 14 | 9.3% | 10.5% | 6.6% |
| Age 15 to 17 | 4.6% | 3.9% | 3.9% |
| Age 18 to 20 | 1.9% | 0.9% | 4.0% |
| Age 21 to 24 | 3.8% | 2.4% | 5.2% |
| Age 25 to 34 | 11.4% | 5.6% | 13.8% |
| Age 35 to 44 | 11.1% | 14.2% | 12.9% |
| Age 45 to 54 | 12.7% | 14.6% | 12.6% |
| Age 55 to 59 | 7.1% | 7.6% | 6.7% |
| Age 60 to 64 | 11.5% | 9.1% | 6.3% |
| Age 65 to 74 | 9.5% | 14.7% | 9.6% |
| Age 75 to 84 | 2.9% | 7.4% | 4.5% |
| Age 85 and over | 1.3% | 1.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Port Byron, IL | Coal Valley, IL | United States |
| White | 94.7% | 94.3% | 59.4% |
| Black | 1.4% | 0.1% | 12.2% |
| Asian | 0.0% | 0.8% | 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% | 0.0% | 3.2% |
| Hispanic | 3.2% | 4.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Port Byron, IL | Coal Valley, IL | United States |
| Married Population | 63.1% | 69.5% | 49.8% |
| Currently Married | 62.0% | 68.7% | 48.0% |
| Married but Separated | 1.1% | 0.9% | 1.8% |
| Single Population | 36.9% | 30.5% | 50.2% |
| Never Married | 20.7% | 12.2% | 33.8% |
| Divorced | 11.5% | 10.5% | 10.8% |
| Widowed | 4.8% | 7.7% | 5.6% |
| space5 | | | |
| Household Size | 2.54 | 2.37 | 2.60 |
| Households | 788 | 1,615 | 124,010,992 |
| Family Households | 551 | 1,197 | 80,755,759 |
| Married couple, w/children | 34.8% | 25.8% | 30.5% |
| Married couple, no children | 48.5% | 61.2% | 42.9% |
| Non Family Households | 237 | 418 | 43,255,233 |
| Single householder, w/children | 10.7% | 5.8% | 15.8% |
| Single householder, no children | 6.0% | 7.3% | 10.8% |