| | Syracuse, KS | Independence, KS | United States |
| Population | 1,600 | 8,584 | 329,725,481 |
| Female Population | 57.1% | 49.7% | 50.5% |
| Male Population | 42.9% | 50.3% | 49.5% |
| Median Age | 34.7 | 38.4 | 38.4 |
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| Population - 2010 | 1,821 | 9,466 | 309,327,143 |
| Population - 2000 | 1,824 | 9,846 | 285,036,114 |
| Population - 1990 | 1,606 | 9,942 | 251,960,433 |
| Pop. 2000 to Now | -10.6% | -14.4% | 15.6% |
| Pop. 1990 to Now | 1.6% | -15.3% | 30.8% |
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| Population Density | 390.3 | 1,119.8 | 93.4 |
| Land Area | 4.1 | 7.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Syracuse, KS | Independence, KS | United States |
| Age 0 to 4 | 5.2% | 5.2% | 5.9% |
| Age 5 to 9 | 11.2% | 7.4% | 6.1% |
| Age 10 to 14 | 6.6% | 7.1% | 6.6% |
| Age 15 to 17 | 7.6% | 3.7% | 3.9% |
| Age 18 to 20 | 4.6% | 2.9% | 4.0% |
| Age 21 to 24 | 2.6% | 6.1% | 5.2% |
| Age 25 to 34 | 12.6% | 13.2% | 13.8% |
| Age 35 to 44 | 17.8% | 10.5% | 12.9% |
| Age 45 to 54 | 7.1% | 10.5% | 12.6% |
| Age 55 to 59 | 5.3% | 6.4% | 6.7% |
| Age 60 to 64 | 6.9% | 8.4% | 6.3% |
| Age 65 to 74 | 5.8% | 10.6% | 9.6% |
| Age 75 to 84 | 5.3% | 5.3% | 4.5% |
| Age 85 and over | 1.6% | 2.8% | 1.9% |
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| Race | | | |
| | Syracuse, KS | Independence, KS | United States |
| White | 58.2% | 80.5% | 59.4% |
| Black | 0.0% | 5.0% | 12.2% |
| Asian | 0.0% | 0.2% | 5.6% |
| Native American | 0.0% | 0.9% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.5% | 0.4% |
| Two or More Races | 1.2% | 5.0% | 3.2% |
| Hispanic | 40.5% | 7.9% | 18.4% |
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| Marriage & Family | | | |
| | Syracuse, KS | Independence, KS | United States |
| Married Population | 48.1% | 43.3% | 49.8% |
| Currently Married | 44.7% | 42.5% | 48.0% |
| Married but Separated | 3.3% | 0.9% | 1.8% |
| Single Population | 51.9% | 56.7% | 50.2% |
| Never Married | 38.3% | 31.0% | 33.8% |
| Divorced | 8.0% | 16.0% | 10.8% |
| Widowed | 5.7% | 9.6% | 5.6% |
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| Household Size | 2.81 | 2.21 | 2.60 |
| Households | 569 | 3,796 | 124,010,992 |
| Family Households | 373 | 2,120 | 80,755,759 |
| Married couple, w/children | 27.3% | 21.3% | 30.5% |
| Married couple, no children | 45.0% | 43.9% | 42.9% |
| Non Family Households | 196 | 1,676 | 43,255,233 |
| Single householder, w/children | 21.4% | 21.1% | 15.8% |
| Single householder, no children | 6.2% | 13.7% | 10.8% |