| | Coffeyville, KS | El Dorado, KS | United States |
| Population | 9,032 | 12,855 | 329,725,481 |
| Female Population | 50.7% | 51.0% | 50.5% |
| Male Population | 49.4% | 49.0% | 49.5% |
| Median Age | 40.5 | 34.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,268 | 13,228 | 309,327,143 |
| Population - 2000 | 11,021 | 12,057 | 285,036,114 |
| Population - 1990 | 12,917 | 11,504 | 251,960,433 |
| Pop. 2000 to Now | -16.8% | 6.6% | 15.6% |
| Pop. 1990 to Now | -29.0% | 11.8% | 30.8% |
| space4 | | | |
| Population Density | 954.7 | 1,403.4 | 93.4 |
| Land Area | 9.5 | 9.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Coffeyville, KS | El Dorado, KS | United States |
| Age 0 to 4 | 5.6% | 9.5% | 5.9% |
| Age 5 to 9 | 7.7% | 5.8% | 6.1% |
| Age 10 to 14 | 4.8% | 6.7% | 6.6% |
| Age 15 to 17 | 4.1% | 3.0% | 3.9% |
| Age 18 to 20 | 5.4% | 7.0% | 4.0% |
| Age 21 to 24 | 4.0% | 5.7% | 5.2% |
| Age 25 to 34 | 14.0% | 13.1% | 13.8% |
| Age 35 to 44 | 9.9% | 9.3% | 12.9% |
| Age 45 to 54 | 9.0% | 9.8% | 12.6% |
| Age 55 to 59 | 10.2% | 6.7% | 6.7% |
| Age 60 to 64 | 6.7% | 7.6% | 6.3% |
| Age 65 to 74 | 8.6% | 8.8% | 9.6% |
| Age 75 to 84 | 6.9% | 4.3% | 4.5% |
| Age 85 and over | 3.2% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Coffeyville, KS | El Dorado, KS | United States |
| White | 62.8% | 88.5% | 59.4% |
| Black | 9.9% | 1.1% | 12.2% |
| Asian | 0.7% | 0.2% | 5.6% |
| Native American | 4.4% | 0.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.0% | 0.4% |
| Two or More Races | 7.4% | 5.0% | 3.2% |
| Hispanic | 14.5% | 4.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Coffeyville, KS | El Dorado, KS | United States |
| Married Population | 38.7% | 52.6% | 49.8% |
| Currently Married | 36.3% | 51.8% | 48.0% |
| Married but Separated | 2.4% | 0.7% | 1.8% |
| Single Population | 61.3% | 47.4% | 50.2% |
| Never Married | 31.5% | 25.6% | 33.8% |
| Divorced | 17.2% | 15.4% | 10.8% |
| Widowed | 12.5% | 6.4% | 5.6% |
| space5 | | | |
| Household Size | 2.37 | 2.29 | 2.60 |
| Households | 3,605 | 5,359 | 124,010,992 |
| Family Households | 1,792 | 3,302 | 80,755,759 |
| Married couple, w/children | 21.2% | 34.1% | 30.5% |
| Married couple, no children | 41.4% | 41.4% | 42.9% |
| Non Family Households | 1,813 | 2,057 | 43,255,233 |
| Single householder, w/children | 23.2% | 17.2% | 15.8% |
| Single householder, no children | 14.3% | 7.3% | 10.8% |