| | Lexington, NE | Columbus, NE | United States |
| Population | 10,325 | 23,954 | 329,725,481 |
| Female Population | 46.3% | 50.8% | 50.5% |
| Male Population | 53.7% | 49.2% | 49.5% |
| Median Age | 30.6 | 37.2 | 38.4 |
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| Population - 2010 | 10,212 | 22,334 | 309,327,143 |
| Population - 2000 | 10,011 | 20,971 | 285,036,114 |
| Population - 1990 | 6,601 | 19,480 | 251,960,433 |
| Pop. 2000 to Now | 1.0% | 12.5% | 15.6% |
| Pop. 1990 to Now | 53.1% | 21.1% | 30.8% |
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| Population Density | 2,294.4 | 2,346.1 | 93.4 |
| Land Area | 4.5 | 10.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Lexington, NE | Columbus, NE | United States |
| Age 0 to 4 | 9.7% | 7.7% | 5.9% |
| Age 5 to 9 | 9.3% | 7.6% | 6.1% |
| Age 10 to 14 | 8.6% | 7.2% | 6.6% |
| Age 15 to 17 | 4.6% | 3.6% | 3.9% |
| Age 18 to 20 | 4.6% | 2.3% | 4.0% |
| Age 21 to 24 | 4.8% | 5.1% | 5.2% |
| Age 25 to 34 | 15.1% | 12.9% | 13.8% |
| Age 35 to 44 | 15.0% | 14.0% | 12.9% |
| Age 45 to 54 | 10.7% | 10.3% | 12.6% |
| Age 55 to 59 | 4.2% | 6.4% | 6.7% |
| Age 60 to 64 | 4.7% | 6.2% | 6.3% |
| Age 65 to 74 | 5.2% | 8.9% | 9.6% |
| Age 75 to 84 | 2.1% | 5.4% | 4.5% |
| Age 85 and over | 1.5% | 2.5% | 1.9% |
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| Race | | | |
| | Lexington, NE | Columbus, NE | United States |
| White | 21.1% | 73.0% | 59.4% |
| Black | 13.6% | 0.6% | 12.2% |
| Asian | 1.1% | 0.7% | 5.6% |
| Native American | 0.3% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 0.3% | 1.6% | 3.2% |
| Hispanic | 63.3% | 23.8% | 18.4% |
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| Marriage & Family | | | |
| | Lexington, NE | Columbus, NE | United States |
| Married Population | 49.6% | 55.6% | 49.8% |
| Currently Married | 47.6% | 53.4% | 48.0% |
| Married but Separated | 2.0% | 2.1% | 1.8% |
| Single Population | 50.4% | 44.4% | 50.2% |
| Never Married | 37.2% | 28.2% | 33.8% |
| Divorced | 8.9% | 8.1% | 10.8% |
| Widowed | 4.4% | 8.2% | 5.6% |
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| Household Size | 3.09 | 2.45 | 2.60 |
| Households | 3,284 | 9,655 | 124,010,992 |
| Family Households | 2,428 | 6,043 | 80,755,759 |
| Married couple, w/children | 36.7% | 34.7% | 30.5% |
| Married couple, no children | 29.2% | 43.4% | 42.9% |
| Non Family Households | 856 | 3,612 | 43,255,233 |
| Single householder, w/children | 25.1% | 16.0% | 15.8% |
| Single householder, no children | 9.0% | 6.0% | 10.8% |