| | Lyndon, KS | Wilder, ID | United States |
| Population | 1,117 | 1,663 | 329,725,481 |
| Female Population | 52.0% | 54.1% | 50.5% |
| Male Population | 48.0% | 45.9% | 49.5% |
| Median Age | 36 | 32.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,054 | 1,534 | 309,327,143 |
| Population - 2000 | 1,038 | 1,462 | 285,036,114 |
| Population - 1990 | 964 | 1,232 | 251,960,433 |
| Pop. 2000 to Now | -2.4% | 23.9% | 15.6% |
| Pop. 1990 to Now | 5.1% | 47.1% | 30.8% |
| space4 | | | |
| Population Density | 1,250.8 | 2,352.2 | 93.4 |
| Land Area | 0.9 | 0.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lyndon, KS | Wilder, ID | United States |
| Age 0 to 4 | 8.4% | 6.4% | 5.9% |
| Age 5 to 9 | 10.9% | 12.1% | 6.1% |
| Age 10 to 14 | 4.5% | 8.7% | 6.6% |
| Age 15 to 17 | 6.1% | 3.7% | 3.9% |
| Age 18 to 20 | 4.7% | 1.6% | 4.0% |
| Age 21 to 24 | 3.7% | 4.0% | 5.2% |
| Age 25 to 34 | 10.0% | 16.5% | 13.8% |
| Age 35 to 44 | 9.6% | 12.7% | 12.9% |
| Age 45 to 54 | 15.3% | 10.9% | 12.6% |
| Age 55 to 59 | 7.4% | 7.6% | 6.7% |
| Age 60 to 64 | 4.3% | 4.7% | 6.3% |
| Age 65 to 74 | 9.4% | 6.3% | 9.6% |
| Age 75 to 84 | 4.7% | 4.5% | 4.5% |
| Age 85 and over | 1.1% | 0.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lyndon, KS | Wilder, ID | United States |
| White | 94.5% | 24.6% | 59.4% |
| Black | 2.2% | 0.0% | 12.2% |
| Asian | 0.0% | 0.8% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.6% | 0.2% |
| Other | 0.0% | 0.8% | 0.4% |
| Two or More Races | 2.3% | 3.6% | 3.2% |
| Hispanic | 0.9% | 69.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lyndon, KS | Wilder, ID | United States |
| Married Population | 45.8% | 64.3% | 49.8% |
| Currently Married | 45.5% | 61.3% | 48.0% |
| Married but Separated | 0.4% | 3.0% | 1.8% |
| Single Population | 54.2% | 35.7% | 50.2% |
| Never Married | 28.7% | 20.0% | 33.8% |
| Divorced | 19.2% | 11.8% | 10.8% |
| Widowed | 6.3% | 3.9% | 5.6% |
| space5 | | | |
| Household Size | 2.96 | 3.07 | 2.60 |
| Households | 369 | 541 | 124,010,992 |
| Family Households | 257 | 438 | 80,755,759 |
| Married couple, w/children | 26.1% | 50.9% | 30.5% |
| Married couple, no children | 44.0% | 28.5% | 42.9% |
| Non Family Households | 112 | 103 | 43,255,233 |
| Single householder, w/children | 17.9% | 11.9% | 15.8% |
| Single householder, no children | 12.1% | 8.7% | 10.8% |