| | Fairbury, NE | Adams, NE | United States |
| Population | 3,916 | 540 | 329,725,481 |
| Female Population | 54.5% | 47.0% | 50.5% |
| Male Population | 45.5% | 53.0% | 49.5% |
| Median Age | 38.9 | 35.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,926 | 584 | 309,327,143 |
| Population - 2000 | 4,262 | 489 | 285,036,114 |
| Population - 1990 | 4,335 | 472 | 251,960,433 |
| Pop. 2000 to Now | -14.5% | 27.2% | 15.6% |
| Pop. 1990 to Now | -15.9% | 31.8% | 30.8% |
| space4 | | | |
| Population Density | 1,550.3 | 907.6 | 93.4 |
| Land Area | 2.5 | 0.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fairbury, NE | Adams, NE | United States |
| Age 0 to 4 | 6.4% | 10.4% | 5.9% |
| Age 5 to 9 | 7.5% | 8.1% | 6.1% |
| Age 10 to 14 | 4.0% | 10.6% | 6.6% |
| Age 15 to 17 | 4.3% | 0.7% | 3.9% |
| Age 18 to 20 | 1.4% | 0.0% | 4.0% |
| Age 21 to 24 | 6.6% | 5.0% | 5.2% |
| Age 25 to 34 | 12.9% | 14.3% | 13.8% |
| Age 35 to 44 | 11.1% | 9.4% | 12.9% |
| Age 45 to 54 | 12.0% | 10.6% | 12.6% |
| Age 55 to 59 | 6.5% | 4.4% | 6.7% |
| Age 60 to 64 | 9.0% | 3.3% | 6.3% |
| Age 65 to 74 | 10.1% | 11.9% | 9.6% |
| Age 75 to 84 | 5.1% | 5.6% | 4.5% |
| Age 85 and over | 3.3% | 5.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fairbury, NE | Adams, NE | United States |
| White | 88.0% | 96.5% | 59.4% |
| Black | 1.1% | 1.5% | 12.2% |
| Asian | 0.5% | 0.0% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.7% | 2.0% | 3.2% |
| Hispanic | 7.7% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Fairbury, NE | Adams, NE | United States |
| Married Population | 47.4% | 66.1% | 49.8% |
| Currently Married | 46.0% | 66.1% | 48.0% |
| Married but Separated | 1.4% | 0.0% | 1.8% |
| Single Population | 52.6% | 33.9% | 50.2% |
| Never Married | 29.9% | 14.6% | 33.8% |
| Divorced | 15.5% | 8.1% | 10.8% |
| Widowed | 7.3% | 11.2% | 5.6% |
| space5 | | | |
| Household Size | 2.32 | 2.43 | 2.60 |
| Households | 1,646 | 208 | 124,010,992 |
| Family Households | 883 | 139 | 80,755,759 |
| Married couple, w/children | 25.8% | 41.0% | 30.5% |
| Married couple, no children | 52.1% | 47.5% | 42.9% |
| Non Family Households | 763 | 69 | 43,255,233 |
| Single householder, w/children | 17.2% | 5.0% | 15.8% |
| Single householder, no children | 4.9% | 6.5% | 10.8% |