| | Madill, OK | Ardmore, OK | United States |
| Population | 3,889 | 24,829 | 329,725,481 |
| Female Population | 48.3% | 52.4% | 50.5% |
| Male Population | 51.7% | 47.6% | 49.5% |
| Median Age | 34.4 | 37.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,756 | 24,516 | 309,327,143 |
| Population - 2000 | 3,410 | 23,711 | 285,036,114 |
| Population - 1990 | 3,069 | 23,079 | 251,960,433 |
| Pop. 2000 to Now | 19.2% | 4.5% | 15.6% |
| Pop. 1990 to Now | 32.4% | 7.3% | 30.8% |
| space4 | | | |
| Population Density | 853.4 | 497.3 | 93.4 |
| Land Area | 4.6 | 49.9 | 3,531,905.4 |
| Water Area | 0.0 | 1.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Madill, OK | Ardmore, OK | United States |
| Age 0 to 4 | 7.2% | 7.3% | 5.9% |
| Age 5 to 9 | 8.7% | 5.7% | 6.1% |
| Age 10 to 14 | 9.4% | 8.0% | 6.6% |
| Age 15 to 17 | 5.8% | 4.7% | 3.9% |
| Age 18 to 20 | 4.5% | 3.3% | 4.0% |
| Age 21 to 24 | 5.4% | 4.4% | 5.2% |
| Age 25 to 34 | 10.8% | 13.9% | 13.8% |
| Age 35 to 44 | 10.5% | 12.7% | 12.9% |
| Age 45 to 54 | 11.9% | 11.7% | 12.6% |
| Age 55 to 59 | 6.0% | 5.7% | 6.7% |
| Age 60 to 64 | 4.7% | 6.0% | 6.3% |
| Age 65 to 74 | 6.3% | 8.6% | 9.6% |
| Age 75 to 84 | 4.7% | 5.8% | 4.5% |
| Age 85 and over | 4.0% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Madill, OK | Ardmore, OK | United States |
| White | 38.8% | 61.4% | 59.4% |
| Black | 4.8% | 9.5% | 12.2% |
| Asian | 0.0% | 2.6% | 5.6% |
| Native American | 4.2% | 6.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.0% | 0.4% |
| Two or More Races | 9.7% | 8.8% | 3.2% |
| Hispanic | 42.2% | 11.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Madill, OK | Ardmore, OK | United States |
| Married Population | 48.6% | 45.7% | 49.8% |
| Currently Married | 43.7% | 42.2% | 48.0% |
| Married but Separated | 4.9% | 3.4% | 1.8% |
| Single Population | 51.4% | 54.3% | 50.2% |
| Never Married | 26.2% | 28.1% | 33.8% |
| Divorced | 16.5% | 17.1% | 10.8% |
| Widowed | 8.8% | 9.1% | 5.6% |
| space5 | | | |
| Household Size | 3.14 | 2.51 | 2.60 |
| Households | 1,208 | 9,602 | 124,010,992 |
| Family Households | 869 | 5,509 | 80,755,759 |
| Married couple, w/children | 47.6% | 30.9% | 30.5% |
| Married couple, no children | 19.1% | 36.5% | 42.9% |
| Non Family Households | 339 | 4,093 | 43,255,233 |
| Single householder, w/children | 25.3% | 22.3% | 15.8% |
| Single householder, no children | 7.9% | 10.4% | 10.8% |