| | Newton, IL | Mount Zion, IL | United States |
| Population | 2,979 | 6,092 | 329,725,481 |
| Female Population | 49.1% | 50.8% | 50.5% |
| Male Population | 50.9% | 49.2% | 49.5% |
| Median Age | 43.6 | 39.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,899 | 5,857 | 309,327,143 |
| Population - 2000 | 3,069 | 4,845 | 285,036,114 |
| Population - 1990 | 3,154 | 4,522 | 251,960,433 |
| Pop. 2000 to Now | -8.2% | 18.9% | 15.6% |
| Pop. 1990 to Now | -10.7% | 27.4% | 30.8% |
| space4 | | | |
| Population Density | 1,425.4 | 1,476.5 | 93.4 |
| Land Area | 2.1 | 4.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Newton, IL | Mount Zion, IL | United States |
| Age 0 to 4 | 6.1% | 4.4% | 5.9% |
| Age 5 to 9 | 7.0% | 12.7% | 6.1% |
| Age 10 to 14 | 3.8% | 11.0% | 6.6% |
| Age 15 to 17 | 2.0% | 2.7% | 3.9% |
| Age 18 to 20 | 5.2% | 3.3% | 4.0% |
| Age 21 to 24 | 3.7% | 3.3% | 5.2% |
| Age 25 to 34 | 12.8% | 5.9% | 13.8% |
| Age 35 to 44 | 11.9% | 20.0% | 12.9% |
| Age 45 to 54 | 11.9% | 7.2% | 12.6% |
| Age 55 to 59 | 5.3% | 6.1% | 6.7% |
| Age 60 to 64 | 9.2% | 5.6% | 6.3% |
| Age 65 to 74 | 12.5% | 10.6% | 9.6% |
| Age 75 to 84 | 6.1% | 4.6% | 4.5% |
| Age 85 and over | 2.8% | 2.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Newton, IL | Mount Zion, IL | United States |
| White | 98.2% | 92.3% | 59.4% |
| Black | 0.4% | 2.7% | 12.2% |
| Asian | 0.0% | 0.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.6% | 0.4% |
| Two or More Races | 0.9% | 3.2% | 3.2% |
| Hispanic | 0.2% | 1.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Newton, IL | Mount Zion, IL | United States |
| Married Population | 52.4% | 69.5% | 49.8% |
| Currently Married | 49.0% | 68.9% | 48.0% |
| Married but Separated | 3.4% | 0.5% | 1.8% |
| Single Population | 47.6% | 30.5% | 50.2% |
| Never Married | 27.3% | 17.4% | 33.8% |
| Divorced | 11.8% | 7.8% | 10.8% |
| Widowed | 8.4% | 5.3% | 5.6% |
| space5 | | | |
| Household Size | 2.20 | 2.86 | 2.60 |
| Households | 1,323 | 2,107 | 124,010,992 |
| Family Households | 869 | 1,626 | 80,755,759 |
| Married couple, w/children | 25.4% | 36.8% | 30.5% |
| Married couple, no children | 44.2% | 53.2% | 42.9% |
| Non Family Households | 454 | 481 | 43,255,233 |
| Single householder, w/children | 12.7% | 6.6% | 15.8% |
| Single householder, no children | 17.7% | 3.4% | 10.8% |