| | Sabula, IA | Culver, IN | United States |
| Population | 519 | 1,258 | 329,725,481 |
| Female Population | 46.4% | 52.9% | 50.5% |
| Male Population | 53.6% | 47.1% | 49.5% |
| Median Age | 42.5 | 57.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 587 | 1,346 | 309,327,143 |
| Population - 2000 | 670 | 1,539 | 285,036,114 |
| Population - 1990 | 710 | 1,404 | 251,960,433 |
| Pop. 2000 to Now | -18.7% | -3.6% | 15.6% |
| Pop. 1990 to Now | -23.2% | 5.7% | 30.8% |
| space4 | | | |
| Population Density | 1,048.5 | 1,201.5 | 93.4 |
| Land Area | 0.5 | 1.0 | 3,531,905.4 |
| Water Area | 0.9 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sabula, IA | Culver, IN | United States |
| Age 0 to 4 | 1.9% | 2.9% | 5.9% |
| Age 5 to 9 | 5.8% | 3.5% | 6.1% |
| Age 10 to 14 | 4.0% | 4.2% | 6.6% |
| Age 15 to 17 | 6.0% | 1.3% | 3.9% |
| Age 18 to 20 | 5.0% | 2.3% | 4.0% |
| Age 21 to 24 | 4.4% | 4.0% | 5.2% |
| Age 25 to 34 | 10.4% | 8.6% | 13.8% |
| Age 35 to 44 | 14.6% | 6.0% | 12.9% |
| Age 45 to 54 | 9.6% | 12.4% | 12.6% |
| Age 55 to 59 | 7.9% | 9.1% | 6.7% |
| Age 60 to 64 | 5.4% | 6.4% | 6.3% |
| Age 65 to 74 | 13.5% | 14.1% | 9.6% |
| Age 75 to 84 | 8.5% | 14.9% | 4.5% |
| Age 85 and over | 2.9% | 10.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sabula, IA | Culver, IN | United States |
| White | 95.8% | 95.5% | 59.4% |
| Black | 0.0% | 1.6% | 12.2% |
| Asian | 1.3% | 0.6% | 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 | 0.6% | 0.0% | 3.2% |
| Hispanic | 2.3% | 2.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sabula, IA | Culver, IN | United States |
| Married Population | 59.0% | 60.4% | 49.8% |
| Currently Married | 59.0% | 58.6% | 48.0% |
| Married but Separated | 0.0% | 1.9% | 1.8% |
| Single Population | 41.0% | 39.6% | 50.2% |
| Never Married | 24.5% | 18.8% | 33.8% |
| Divorced | 7.4% | 13.5% | 10.8% |
| Widowed | 9.2% | 7.2% | 5.6% |
| space5 | | | |
| Household Size | 2.22 | 2.01 | 2.60 |
| Households | 234 | 597 | 124,010,992 |
| Family Households | 166 | 366 | 80,755,759 |
| Married couple, w/children | 21.7% | 18.0% | 30.5% |
| Married couple, no children | 57.2% | 66.4% | 42.9% |
| Non Family Households | 68 | 231 | 43,255,233 |
| Single householder, w/children | 10.8% | 3.6% | 15.8% |
| Single householder, no children | 10.2% | 12.0% | 10.8% |