| | Clarks, NE | Aurora, NE | United States |
| Population | 333 | 4,642 | 329,725,481 |
| Female Population | 43.5% | 49.2% | 50.5% |
| Male Population | 56.5% | 50.8% | 49.5% |
| Median Age | 38.1 | 40.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 368 | 4,485 | 309,327,143 |
| Population - 2000 | 361 | 4,225 | 285,036,114 |
| Population - 1990 | 379 | 3,810 | 251,960,433 |
| Pop. 2000 to Now | -4.4% | 6.3% | 15.6% |
| Pop. 1990 to Now | -9.0% | 17.9% | 30.8% |
| space4 | | | |
| Population Density | 1,060.5 | 1,524.5 | 93.4 |
| Land Area | 0.3 | 3.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Clarks, NE | Aurora, NE | United States |
| Age 0 to 4 | 5.7% | 6.2% | 5.9% |
| Age 5 to 9 | 5.7% | 7.7% | 6.1% |
| Age 10 to 14 | 6.3% | 8.3% | 6.6% |
| Age 15 to 17 | 4.5% | 3.9% | 3.9% |
| Age 18 to 20 | 3.9% | 4.1% | 4.0% |
| Age 21 to 24 | 1.5% | 3.0% | 5.2% |
| Age 25 to 34 | 19.2% | 8.7% | 13.8% |
| Age 35 to 44 | 9.6% | 13.2% | 12.9% |
| Age 45 to 54 | 11.1% | 12.1% | 12.6% |
| Age 55 to 59 | 10.5% | 4.7% | 6.7% |
| Age 60 to 64 | 6.0% | 6.4% | 6.3% |
| Age 65 to 74 | 8.4% | 10.6% | 9.6% |
| Age 75 to 84 | 6.0% | 7.9% | 4.5% |
| Age 85 and over | 1.5% | 3.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Clarks, NE | Aurora, NE | United States |
| White | 79.9% | 98.8% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 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 | 3.0% | 0.2% | 3.2% |
| Hispanic | 17.1% | 1.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Clarks, NE | Aurora, NE | United States |
| Married Population | 54.0% | 61.1% | 49.8% |
| Currently Married | 54.0% | 60.1% | 48.0% |
| Married but Separated | 0.0% | 1.1% | 1.8% |
| Single Population | 46.0% | 38.9% | 50.2% |
| Never Married | 25.5% | 19.8% | 33.8% |
| Divorced | 11.3% | 12.6% | 10.8% |
| Widowed | 9.1% | 6.5% | 5.6% |
| space5 | | | |
| Household Size | 2.50 | 2.48 | 2.60 |
| Households | 133 | 1,836 | 124,010,992 |
| Family Households | 89 | 1,289 | 80,755,759 |
| Married couple, w/children | 39.3% | 31.5% | 30.5% |
| Married couple, no children | 40.4% | 50.6% | 42.9% |
| Non Family Households | 44 | 547 | 43,255,233 |
| Single householder, w/children | 6.7% | 11.1% | 15.8% |
| Single householder, no children | 13.5% | 6.8% | 10.8% |