| | Mulvane, KS | Winfield, KS | United States |
| Population | 5,676 | 11,817 | 329,725,481 |
| Female Population | 53.8% | 48.7% | 50.5% |
| Male Population | 46.2% | 51.3% | 49.5% |
| Median Age | 42.2 | 36.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,143 | 12,334 | 309,327,143 |
| Population - 2000 | 5,155 | 12,206 | 285,036,114 |
| Population - 1990 | 4,674 | 11,931 | 251,960,433 |
| Pop. 2000 to Now | 27.4% | -3.3% | 15.6% |
| Pop. 1990 to Now | 40.5% | -1.0% | 30.8% |
| space4 | | | |
| Population Density | 1,272.7 | 1,060.3 | 93.4 |
| Land Area | 4.5 | 11.1 | 3,531,905.4 |
| Water Area | 0.0 | 1.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mulvane, KS | Winfield, KS | United States |
| Age 0 to 4 | 3.8% | 4.7% | 5.9% |
| Age 5 to 9 | 7.8% | 7.2% | 6.1% |
| Age 10 to 14 | 8.7% | 7.3% | 6.6% |
| Age 15 to 17 | 4.7% | 4.3% | 3.9% |
| Age 18 to 20 | 4.4% | 5.4% | 4.0% |
| Age 21 to 24 | 4.7% | 6.3% | 5.2% |
| Age 25 to 34 | 7.6% | 12.9% | 13.8% |
| Age 35 to 44 | 12.7% | 10.9% | 12.9% |
| Age 45 to 54 | 10.6% | 12.1% | 12.6% |
| Age 55 to 59 | 7.2% | 5.1% | 6.7% |
| Age 60 to 64 | 8.3% | 5.9% | 6.3% |
| Age 65 to 74 | 11.9% | 8.6% | 9.6% |
| Age 75 to 84 | 5.0% | 5.4% | 4.5% |
| Age 85 and over | 2.5% | 3.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mulvane, KS | Winfield, KS | United States |
| White | 91.7% | 79.9% | 59.4% |
| Black | 0.0% | 2.6% | 12.2% |
| Asian | 0.0% | 3.9% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.0% | 0.4% |
| Two or More Races | 5.0% | 3.5% | 3.2% |
| Hispanic | 2.9% | 9.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mulvane, KS | Winfield, KS | United States |
| Married Population | 56.4% | 44.5% | 49.8% |
| Currently Married | 55.9% | 42.9% | 48.0% |
| Married but Separated | 0.5% | 1.6% | 1.8% |
| Single Population | 43.6% | 55.5% | 50.2% |
| Never Married | 18.9% | 33.7% | 33.8% |
| Divorced | 18.2% | 13.1% | 10.8% |
| Widowed | 6.4% | 8.6% | 5.6% |
| space5 | | | |
| Household Size | 2.43 | 2.51 | 2.60 |
| Households | 2,315 | 4,140 | 124,010,992 |
| Family Households | 1,681 | 2,612 | 80,755,759 |
| Married couple, w/children | 25.0% | 30.2% | 30.5% |
| Married couple, no children | 52.5% | 38.1% | 42.9% |
| Non Family Households | 634 | 1,528 | 43,255,233 |
| Single householder, w/children | 15.8% | 26.0% | 15.8% |
| Single householder, no children | 6.7% | 5.7% | 10.8% |