| | Valley Center, KS | Wamego, KS | United States |
| Population | 8,365 | 4,341 | 329,725,481 |
| Female Population | 50.8% | 52.8% | 50.5% |
| Male Population | 49.3% | 47.2% | 49.5% |
| Median Age | 33.2 | 35.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,828 | 4,415 | 309,327,143 |
| Population - 2000 | 4,883 | 4,246 | 285,036,114 |
| Population - 1990 | 3,624 | 3,706 | 251,960,433 |
| Pop. 2000 to Now | 51.2% | 11.1% | 15.6% |
| Pop. 1990 to Now | 103.8% | 27.3% | 30.8% |
| space4 | | | |
| Population Density | 1,177.8 | 1,821.7 | 93.4 |
| Land Area | 7.1 | 2.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Valley Center, KS | Wamego, KS | United States |
| Age 0 to 4 | 10.9% | 3.6% | 5.9% |
| Age 5 to 9 | 9.9% | 14.3% | 6.1% |
| Age 10 to 14 | 9.4% | 5.8% | 6.6% |
| Age 15 to 17 | 6.2% | 4.9% | 3.9% |
| Age 18 to 20 | 1.8% | 4.1% | 4.0% |
| Age 21 to 24 | 2.0% | 5.5% | 5.2% |
| Age 25 to 34 | 16.1% | 11.7% | 13.8% |
| Age 35 to 44 | 9.6% | 13.4% | 12.9% |
| Age 45 to 54 | 8.0% | 18.4% | 12.6% |
| Age 55 to 59 | 4.2% | 4.7% | 6.7% |
| Age 60 to 64 | 4.6% | 4.1% | 6.3% |
| Age 65 to 74 | 10.8% | 4.6% | 9.6% |
| Age 75 to 84 | 4.5% | 2.8% | 4.5% |
| Age 85 and over | 2.3% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Valley Center, KS | Wamego, KS | United States |
| White | 86.8% | 84.3% | 59.4% |
| Black | 0.0% | 4.1% | 12.2% |
| Asian | 1.8% | 0.0% | 5.6% |
| Native American | 0.0% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 5.5% | 1.9% | 3.2% |
| Hispanic | 5.9% | 9.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Valley Center, KS | Wamego, KS | United States |
| Married Population | 62.8% | 53.4% | 49.8% |
| Currently Married | 62.7% | 50.7% | 48.0% |
| Married but Separated | 0.2% | 2.7% | 1.8% |
| Single Population | 37.2% | 46.6% | 50.2% |
| Never Married | 23.7% | 30.8% | 33.8% |
| Divorced | 7.1% | 11.7% | 10.8% |
| Widowed | 6.3% | 4.1% | 5.6% |
| space5 | | | |
| Household Size | 2.79 | 2.78 | 2.60 |
| Households | 3,001 | 1,536 | 124,010,992 |
| Family Households | 2,187 | 1,059 | 80,755,759 |
| Married couple, w/children | 41.6% | 36.0% | 30.5% |
| Married couple, no children | 41.8% | 36.2% | 42.9% |
| Non Family Households | 814 | 477 | 43,255,233 |
| Single householder, w/children | 14.3% | 16.4% | 15.8% |
| Single householder, no children | 2.4% | 11.4% | 10.8% |