| | Topeka, IN | Syracuse, IN | United States |
| Population | 1,055 | 3,069 | 329,725,481 |
| Female Population | 53.4% | 49.7% | 50.5% |
| Male Population | 46.6% | 50.3% | 49.5% |
| Median Age | 34.2 | 44.8 | 38.4 |
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| Population - 2010 | 1,155 | 2,857 | 309,327,143 |
| Population - 2000 | 1,159 | 3,038 | 285,036,114 |
| Population - 1990 | 912 | 2,729 | 251,960,433 |
| Pop. 2000 to Now | 7.3% | -6.0% | 15.6% |
| Pop. 1990 to Now | 36.4% | 4.7% | 30.8% |
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| Population Density | 634.4 | 1,555.5 | 93.4 |
| Land Area | 1.7 | 2.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.4 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Topeka, IN | Syracuse, IN | United States |
| Age 0 to 4 | 8.5% | 3.3% | 5.9% |
| Age 5 to 9 | 9.9% | 2.7% | 6.1% |
| Age 10 to 14 | 7.8% | 7.1% | 6.6% |
| Age 15 to 17 | 5.9% | 6.7% | 3.9% |
| Age 18 to 20 | 3.1% | 4.7% | 4.0% |
| Age 21 to 24 | 3.7% | 3.8% | 5.2% |
| Age 25 to 34 | 13.2% | 11.8% | 13.8% |
| Age 35 to 44 | 19.2% | 10.7% | 12.9% |
| Age 45 to 54 | 2.9% | 13.6% | 12.6% |
| Age 55 to 59 | 6.2% | 7.4% | 6.7% |
| Age 60 to 64 | 8.7% | 11.0% | 6.3% |
| Age 65 to 74 | 8.3% | 11.2% | 9.6% |
| Age 75 to 84 | 2.6% | 4.1% | 4.5% |
| Age 85 and over | 0.0% | 2.0% | 1.9% |
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| Race | | | |
| | Topeka, IN | Syracuse, IN | United States |
| White | 80.3% | 84.0% | 59.4% |
| Black | 0.6% | 0.4% | 12.2% |
| Asian | 0.0% | 0.3% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 7.9% | 0.4% |
| Two or More Races | 18.2% | 0.7% | 3.2% |
| Hispanic | 0.9% | 6.7% | 18.4% |
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| Marriage & Family | | | |
| | Topeka, IN | Syracuse, IN | United States |
| Married Population | 55.8% | 45.1% | 49.8% |
| Currently Married | 48.5% | 45.1% | 48.0% |
| Married but Separated | 7.3% | 0.0% | 1.8% |
| Single Population | 44.2% | 54.9% | 50.2% |
| Never Married | 28.8% | 28.1% | 33.8% |
| Divorced | 12.6% | 16.5% | 10.8% |
| Widowed | 2.8% | 10.3% | 5.6% |
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| Household Size | 3.08 | 2.31 | 2.60 |
| Households | 343 | 1,327 | 124,010,992 |
| Family Households | 255 | 793 | 80,755,759 |
| Married couple, w/children | 36.1% | 21.8% | 30.5% |
| Married couple, no children | 27.8% | 39.0% | 42.9% |
| Non Family Households | 88 | 534 | 43,255,233 |
| Single householder, w/children | 11.8% | 16.8% | 15.8% |
| Single householder, no children | 24.3% | 22.4% | 10.8% |