| | Spencer, TN | Elizabeth, CO | United States |
| Population | 1,531 | 1,792 | 329,725,481 |
| Female Population | 54.4% | 52.7% | 50.5% |
| Male Population | 45.6% | 47.3% | 49.5% |
| Median Age | 48.3 | 34.1 | 38.4 |
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| Population - 2010 | 1,611 | 1,365 | 309,327,143 |
| Population - 2000 | 1,713 | 1,434 | 285,036,114 |
| Population - 1990 | 1,125 | 818 | 251,960,433 |
| Pop. 2000 to Now | -0.2% | 30.2% | 15.6% |
| Pop. 1990 to Now | 52.0% | 128.2% | 30.8% |
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| Population Density | 233.6 | 1,374.2 | 93.4 |
| Land Area | 6.6 | 1.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Spencer, TN | Elizabeth, CO | United States |
| Age 0 to 4 | 2.8% | 5.6% | 5.9% |
| Age 5 to 9 | 4.7% | 4.1% | 6.1% |
| Age 10 to 14 | 5.4% | 8.1% | 6.6% |
| Age 15 to 17 | 4.3% | 3.3% | 3.9% |
| Age 18 to 20 | 2.2% | 1.6% | 4.0% |
| Age 21 to 24 | 2.4% | 7.3% | 5.2% |
| Age 25 to 34 | 10.8% | 21.7% | 13.8% |
| Age 35 to 44 | 9.3% | 9.9% | 12.9% |
| Age 45 to 54 | 18.9% | 8.0% | 12.6% |
| Age 55 to 59 | 6.5% | 9.2% | 6.7% |
| Age 60 to 64 | 7.9% | 6.9% | 6.3% |
| Age 65 to 74 | 15.5% | 12.1% | 9.6% |
| Age 75 to 84 | 7.6% | 2.0% | 4.5% |
| Age 85 and over | 1.7% | 0.4% | 1.9% |
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| Race | | | |
| | Spencer, TN | Elizabeth, CO | United States |
| White | 94.4% | 89.1% | 59.4% |
| Black | 0.5% | 0.0% | 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 | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.9% | 3.6% | 3.2% |
| Hispanic | 0.2% | 7.1% | 18.4% |
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| Marriage & Family | | | |
| | Spencer, TN | Elizabeth, CO | United States |
| Married Population | 46.0% | 67.8% | 49.8% |
| Currently Married | 41.2% | 66.6% | 48.0% |
| Married but Separated | 4.8% | 1.2% | 1.8% |
| Single Population | 54.0% | 32.2% | 50.2% |
| Never Married | 22.1% | 24.5% | 33.8% |
| Divorced | 19.8% | 5.0% | 10.8% |
| Widowed | 12.2% | 2.7% | 5.6% |
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| Household Size | 2.32 | 2.71 | 2.60 |
| Households | 615 | 661 | 124,010,992 |
| Family Households | 418 | 539 | 80,755,759 |
| Married couple, w/children | 21.8% | 28.6% | 30.5% |
| Married couple, no children | 44.7% | 55.7% | 42.9% |
| Non Family Households | 197 | 122 | 43,255,233 |
| Single householder, w/children | 16.3% | 4.8% | 15.8% |
| Single householder, no children | 17.2% | 10.9% | 10.8% |