| | Big Stone City, SD | United States, SD |
| Population | 620 | 329,725,481 |
| Female Population | 46.0% | 50.5% |
| Male Population | 54.0% | 49.5% |
| Median Age | 53.8 | 38.4 |
| space3 | | |
| Population - 2010 | 470 | 309,327,143 |
| Population - 2000 | 605 | 285,036,114 |
| Population - 1990 | 669 | 251,960,433 |
| Pop. 2000 to Now | -25.5% | 15.6% |
| Pop. 1990 to Now | -32.6% | 30.8% |
| space4 | | |
| Population Density | 517.5 | 93.4 |
| Land Area | 1.2 | 3,531,905.4 |
| Water Area | 0.0 | 264,836.8 |
| space | | |
| Est. Total Population By Age | | |
| | Big Stone City, SD | Big Stone City, SD |
| Age 0 to 4 | 4.4% | 5.9% |
| Age 5 to 9 | 4.8% | 6.1% |
| Age 10 to 14 | 4.4% | 6.6% |
| Age 15 to 17 | 2.6% | 3.9% |
| Age 18 to 20 | 0.8% | 4.0% |
| Age 21 to 24 | 6.6% | 5.2% |
| Age 25 to 34 | 9.8% | 13.8% |
| Age 35 to 44 | 6.9% | 12.9% |
| Age 45 to 54 | 10.8% | 12.6% |
| Age 55 to 59 | 5.5% | 6.7% |
| Age 60 to 64 | 4.4% | 6.3% |
| Age 65 to 74 | 16.1% | 9.6% |
| Age 75 to 84 | 21.5% | 4.5% |
| Age 85 and over | 1.5% | 1.9% |
| space1 | | |
| Race | | |
| | Big Stone City, SD | Big Stone City, SD |
| White | 94.2% | 59.4% |
| Black | 0.0% | 12.2% |
| Asian | 0.3% | 5.6% |
| Native American | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% |
| Other | 0.0% | 0.4% |
| Two or More Races | 4.7% | 3.2% |
| Hispanic | 0.8% | 18.4% |
| space2 | | |
| Marriage & Family | | |
| | Big Stone City, SD | Big Stone City, SD |
| Married Population | 61.0% | 49.8% |
| Currently Married | 61.0% | 48.0% |
| Married but Separated | 0.0% | 1.8% |
| Single Population | 39.0% | 50.2% |
| Never Married | 24.3% | 33.8% |
| Divorced | 11.2% | 10.8% |
| Widowed | 3.5% | 5.6% |
| space5 | | |
| Household Size | 1.97 | 2.60 |
| Households | 314 | 124,010,992 |
| Family Households | 181 | 80,755,759 |
| Married couple, w/children | 10.5% | 30.5% |
| Married couple, no children | 76.8% | 42.9% |
| Non Family Households | 133 | 43,255,233 |
| Single householder, w/children | 12.7% | 15.8% |
| Single householder, no children | 0.0% | 10.8% |