| | Sigourney, IA | Reynoldsville, PA | United States |
| Population | 1,805 | 2,568 | 329,725,481 |
| Female Population | 47.3% | 48.0% | 50.5% |
| Male Population | 52.7% | 52.0% | 49.5% |
| Median Age | 49.4 | 37.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,059 | 2,756 | 309,327,143 |
| Population - 2000 | 2,209 | 2,710 | 285,036,114 |
| Population - 1990 | 2,111 | 2,818 | 251,960,433 |
| Pop. 2000 to Now | -10.4% | -3.1% | 15.6% |
| Pop. 1990 to Now | -6.2% | -6.9% | 30.8% |
| space4 | | | |
| Population Density | 826.8 | 1,752.9 | 93.4 |
| Land Area | 2.2 | 1.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sigourney, IA | Reynoldsville, PA | United States |
| Age 0 to 4 | 2.3% | 9.2% | 5.9% |
| Age 5 to 9 | 3.4% | 4.1% | 6.1% |
| Age 10 to 14 | 6.8% | 5.3% | 6.6% |
| Age 15 to 17 | 3.6% | 6.3% | 3.9% |
| Age 18 to 20 | 4.5% | 5.0% | 4.0% |
| Age 21 to 24 | 2.0% | 5.6% | 5.2% |
| Age 25 to 34 | 11.0% | 11.4% | 13.8% |
| Age 35 to 44 | 11.9% | 12.2% | 12.9% |
| Age 45 to 54 | 12.1% | 16.6% | 12.6% |
| Age 55 to 59 | 6.5% | 5.5% | 6.7% |
| Age 60 to 64 | 5.0% | 3.1% | 6.3% |
| Age 65 to 74 | 12.8% | 9.6% | 9.6% |
| Age 75 to 84 | 12.1% | 4.9% | 4.5% |
| Age 85 and over | 6.1% | 1.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sigourney, IA | Reynoldsville, PA | United States |
| White | 97.0% | 94.5% | 59.4% |
| Black | 0.9% | 1.6% | 12.2% |
| Asian | 0.1% | 0.9% | 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 | 1.7% | 2.1% | 3.2% |
| Hispanic | 0.4% | 0.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sigourney, IA | Reynoldsville, PA | United States |
| Married Population | 44.0% | 39.7% | 49.8% |
| Currently Married | 43.2% | 34.5% | 48.0% |
| Married but Separated | 0.8% | 5.2% | 1.8% |
| Single Population | 56.0% | 60.3% | 50.2% |
| Never Married | 27.3% | 39.9% | 33.8% |
| Divorced | 16.5% | 14.7% | 10.8% |
| Widowed | 12.2% | 5.7% | 5.6% |
| space5 | | | |
| Household Size | 1.94 | 2.56 | 2.60 |
| Households | 876 | 1,002 | 124,010,992 |
| Family Households | 480 | 584 | 80,755,759 |
| Married couple, w/children | 15.6% | 24.5% | 30.5% |
| Married couple, no children | 53.8% | 35.8% | 42.9% |
| Non Family Households | 396 | 418 | 43,255,233 |
| Single householder, w/children | 21.5% | 24.7% | 15.8% |
| Single householder, no children | 9.2% | 15.1% | 10.8% |