| | Marysville, KS | Russell, KS | United States |
| Population | 3,400 | 4,363 | 329,725,481 |
| Female Population | 51.4% | 52.1% | 50.5% |
| Male Population | 48.6% | 48.0% | 49.5% |
| Median Age | 38.5 | 41.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,305 | 4,527 | 309,327,143 |
| Population - 2000 | 3,271 | 4,696 | 285,036,114 |
| Population - 1990 | 3,359 | 4,781 | 251,960,433 |
| Pop. 2000 to Now | -0.6% | -6.7% | 15.6% |
| Pop. 1990 to Now | -3.2% | -8.3% | 30.8% |
| space4 | | | |
| Population Density | 742.5 | 905.9 | 93.4 |
| Land Area | 4.6 | 4.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Marysville, KS | Russell, KS | United States |
| Age 0 to 4 | 6.6% | 7.9% | 5.9% |
| Age 5 to 9 | 7.6% | 7.1% | 6.1% |
| Age 10 to 14 | 9.4% | 5.5% | 6.6% |
| Age 15 to 17 | 5.0% | 3.5% | 3.9% |
| Age 18 to 20 | 2.1% | 4.7% | 4.0% |
| Age 21 to 24 | 4.4% | 1.9% | 5.2% |
| Age 25 to 34 | 7.2% | 11.8% | 13.8% |
| Age 35 to 44 | 16.0% | 11.6% | 12.9% |
| Age 45 to 54 | 9.3% | 11.4% | 12.6% |
| Age 55 to 59 | 9.0% | 9.0% | 6.7% |
| Age 60 to 64 | 5.6% | 4.4% | 6.3% |
| Age 65 to 74 | 8.6% | 9.9% | 9.6% |
| Age 75 to 84 | 6.3% | 5.4% | 4.5% |
| Age 85 and over | 2.9% | 5.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Marysville, KS | Russell, KS | United States |
| White | 93.3% | 88.9% | 59.4% |
| Black | 1.1% | 2.6% | 12.2% |
| Asian | 0.1% | 0.0% | 5.6% |
| Native American | 0.0% | 0.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.5% | 2.6% | 3.2% |
| Hispanic | 3.9% | 5.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Marysville, KS | Russell, KS | United States |
| Married Population | 53.1% | 48.5% | 49.8% |
| Currently Married | 50.0% | 47.6% | 48.0% |
| Married but Separated | 3.1% | 0.8% | 1.8% |
| Single Population | 46.9% | 51.5% | 50.2% |
| Never Married | 25.2% | 24.6% | 33.8% |
| Divorced | 12.2% | 15.0% | 10.8% |
| Widowed | 9.4% | 12.0% | 5.6% |
| space5 | | | |
| Household Size | 2.28 | 2.32 | 2.60 |
| Households | 1,465 | 1,837 | 124,010,992 |
| Family Households | 796 | 956 | 80,755,759 |
| Married couple, w/children | 30.9% | 24.8% | 30.5% |
| Married couple, no children | 44.3% | 56.9% | 42.9% |
| Non Family Households | 669 | 881 | 43,255,233 |
| Single householder, w/children | 17.8% | 17.6% | 15.8% |
| Single householder, no children | 6.9% | 0.7% | 10.8% |