| | Copan, OK | Poteau, OK | United States |
| Population | 908 | 8,741 | 329,725,481 |
| Female Population | 62.1% | 49.4% | 50.5% |
| Male Population | 37.9% | 50.6% | 49.5% |
| Median Age | 50.3 | 35 | 38.4 |
| space3 | | | |
| Population - 2010 | 732 | 8,556 | 309,327,143 |
| Population - 2000 | 796 | 7,939 | 285,036,114 |
| Population - 1990 | 809 | 7,210 | 251,960,433 |
| Pop. 2000 to Now | -6.3% | 12.2% | 15.6% |
| Pop. 1990 to Now | -7.8% | 23.5% | 30.8% |
| space4 | | | |
| Population Density | 889.3 | 289.9 | 93.4 |
| Land Area | 1.0 | 30.2 | 3,531,905.4 |
| Water Area | 0.0 | 2.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Copan, OK | Poteau, OK | United States |
| Age 0 to 4 | 1.8% | 6.8% | 5.9% |
| Age 5 to 9 | 8.2% | 7.1% | 6.1% |
| Age 10 to 14 | 9.1% | 6.9% | 6.6% |
| Age 15 to 17 | 2.5% | 4.1% | 3.9% |
| Age 18 to 20 | 3.0% | 4.5% | 4.0% |
| Age 21 to 24 | 2.0% | 4.2% | 5.2% |
| Age 25 to 34 | 9.5% | 16.5% | 13.8% |
| Age 35 to 44 | 8.5% | 11.9% | 12.9% |
| Age 45 to 54 | 12.0% | 11.7% | 12.6% |
| Age 55 to 59 | 7.3% | 4.8% | 6.7% |
| Age 60 to 64 | 4.0% | 5.9% | 6.3% |
| Age 65 to 74 | 7.7% | 7.5% | 9.6% |
| Age 75 to 84 | 23.2% | 5.8% | 4.5% |
| Age 85 and over | 1.3% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Copan, OK | Poteau, OK | United States |
| White | 70.0% | 66.0% | 59.4% |
| Black | 0.3% | 1.0% | 12.2% |
| Asian | 0.3% | 0.4% | 5.6% |
| Native American | 20.0% | 8.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 7.3% | 8.3% | 3.2% |
| Hispanic | 2.0% | 15.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Copan, OK | Poteau, OK | United States |
| Married Population | 42.9% | 42.5% | 49.8% |
| Currently Married | 37.7% | 39.7% | 48.0% |
| Married but Separated | 5.2% | 2.7% | 1.8% |
| Single Population | 57.1% | 57.5% | 50.2% |
| Never Married | 15.8% | 30.1% | 33.8% |
| Divorced | 12.9% | 16.7% | 10.8% |
| Widowed | 28.4% | 10.7% | 5.6% |
| space5 | | | |
| Household Size | 1.93 | 2.70 | 2.60 |
| Households | 470 | 3,121 | 124,010,992 |
| Family Households | 215 | 2,055 | 80,755,759 |
| Married couple, w/children | 17.2% | 27.0% | 30.5% |
| Married couple, no children | 47.4% | 31.1% | 42.9% |
| Non Family Households | 255 | 1,066 | 43,255,233 |
| Single householder, w/children | 24.7% | 29.7% | 15.8% |
| Single householder, no children | 10.7% | 12.2% | 10.8% |