| | Woonsocket, SD | Pollock, SD | United States |
| Population | 730 | 210 | 329,725,481 |
| Female Population | 52.5% | 39.1% | 50.5% |
| Male Population | 47.5% | 61.0% | 49.5% |
| Median Age | 35.2 | 55.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 652 | 241 | 309,327,143 |
| Population - 2000 | 720 | 339 | 285,036,114 |
| Population - 1990 | 766 | 379 | 251,960,433 |
| Pop. 2000 to Now | -11.3% | -33.0% | 15.6% |
| Pop. 1990 to Now | -16.6% | -40.1% | 30.8% |
| space4 | | | |
| Population Density | 931.1 | 654.2 | 93.4 |
| Land Area | 0.8 | 0.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Woonsocket, SD | Pollock, SD | United States |
| Age 0 to 4 | 11.4% | 2.9% | 5.9% |
| Age 5 to 9 | 7.1% | 4.3% | 6.1% |
| Age 10 to 14 | 7.3% | 7.6% | 6.6% |
| Age 15 to 17 | 4.0% | 1.9% | 3.9% |
| Age 18 to 20 | 3.0% | 1.4% | 4.0% |
| Age 21 to 24 | 4.2% | 1.9% | 5.2% |
| Age 25 to 34 | 12.2% | 4.3% | 13.8% |
| Age 35 to 44 | 8.2% | 11.0% | 12.9% |
| Age 45 to 54 | 6.0% | 14.3% | 12.6% |
| Age 55 to 59 | 8.2% | 12.9% | 6.7% |
| Age 60 to 64 | 7.0% | 7.1% | 6.3% |
| Age 65 to 74 | 9.9% | 21.4% | 9.6% |
| Age 75 to 84 | 4.5% | 5.2% | 4.5% |
| Age 85 and over | 7.0% | 3.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Woonsocket, SD | Pollock, SD | United States |
| White | 93.2% | 90.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.5% | 3.3% | 3.2% |
| Hispanic | 6.3% | 6.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Woonsocket, SD | Pollock, SD | United States |
| Married Population | 47.2% | 67.6% | 49.8% |
| Currently Married | 46.9% | 62.6% | 48.0% |
| Married but Separated | 0.4% | 5.0% | 1.8% |
| Single Population | 52.8% | 32.4% | 50.2% |
| Never Married | 29.2% | 16.8% | 33.8% |
| Divorced | 12.4% | 7.8% | 10.8% |
| Widowed | 11.3% | 7.8% | 5.6% |
| space5 | | | |
| Household Size | 2.28 | 1.86 | 2.60 |
| Households | 300 | 113 | 124,010,992 |
| Family Households | 170 | 62 | 80,755,759 |
| Married couple, w/children | 24.1% | 21.0% | 30.5% |
| Married couple, no children | 51.8% | 69.4% | 42.9% |
| Non Family Households | 130 | 51 | 43,255,233 |
| Single householder, w/children | 22.9% | 9.7% | 15.8% |
| Single householder, no children | 1.2% | 0.0% | 10.8% |